Merging upstream version 127.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

360 files changed, 1035 insertions, 1210 deletions

diff --git a/taskcluster/android_taskgraph/target_tasks.py b/taskcluster/android_taskgraph/target_tasks.py
index 38b1f7b772..13cc8d87dd 100644
--- a/taskcluster/android_taskgraph/target_tasks.py
+++ b/taskcluster/android_taskgraph/target_tasks.py
@@ -2,12 +2,12 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-from taskgraph.target_tasks import _target_task
+from taskgraph.target_tasks import register_target_task
 
 from android_taskgraph.release_type import does_task_match_release_type
 
 
-@_target_task("promote_android")
+@register_target_task("promote_android")
 def target_tasks_promote(full_task_graph, parameters, graph_config):
     return _filter_release_promotion(
         full_task_graph,
@@ -17,7 +17,7 @@ def target_tasks_promote(full_task_graph, parameters, graph_config):
     )
 
 
-@_target_task("push_android")
+@register_target_task("push_android")
 def target_tasks_push(full_task_graph, parameters, graph_config):
     filtered_for_candidates = target_tasks_promote(
         full_task_graph,
@@ -29,7 +29,7 @@ def target_tasks_push(full_task_graph, parameters, graph_config):
     )
 
 
-@_target_task("ship_android")
+@register_target_task("ship_android")
 def target_tasks_ship(full_task_graph, parameters, graph_config):
     filtered_for_candidates = target_tasks_push(
         full_task_graph,
@@ -71,7 +71,7 @@ def _filter_release_promotion(
     return [l for l, t in full_task_graph.tasks.items() if filter(t, parameters)]
 
 
-@_target_task("screenshots")
+@register_target_task("screenshots")
 def target_tasks_screnshots(full_task_graph, parameters, graph_config):
     """Select the set of tasks required to generate screenshots on a real device."""
 
@@ -81,7 +81,7 @@ def target_tasks_screnshots(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t, parameters)]
 
 
-@_target_task("legacy_api_ui_tests")
+@register_target_task("legacy_api_ui_tests")
 def target_tasks_legacy_api_ui_tests(full_task_graph, parameters, graph_config):
     """Select the set of tasks required to run select UI tests on other API."""
 
diff --git a/taskcluster/android_taskgraph/transforms/build_android_app.py b/taskcluster/android_taskgraph/transforms/build_android_app.py
index 67fc210ad5..ee8c4c564f 100644
--- a/taskcluster/android_taskgraph/transforms/build_android_app.py
+++ b/taskcluster/android_taskgraph/transforms/build_android_app.py
@@ -22,7 +22,6 @@ def add_common_config(config, tasks):
         fetches["toolchain"] = [
             "android-sdk-linux",
             "android-gradle-dependencies",
-            "android-gradle-python-envs",
             "linux64-jdk",
         ]
         fetches["build-fat-aar"] = [
diff --git a/taskcluster/ci/github-sync/kind.yml b/taskcluster/ci/github-sync/kind.yml
deleted file mode 100644
index 7c0b8136c4..0000000000
--- a/taskcluster/ci/github-sync/kind.yml
+++ /dev/null
@@ -1,53 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
----
-loader: gecko_taskgraph.loader.transform:loader
-
-kind-dependencies:
-    - toolchain
-    - build
-
-transforms:
-    - gecko_taskgraph.transforms.github_sync:transforms
-    - gecko_taskgraph.transforms.job:transforms
-    - gecko_taskgraph.transforms.task:transforms
-
-job-defaults:
-    attributes:
-        retrigger: true
-    run-on-projects: ['mozilla-central-only']
-    worker-type: b-linux-gcp
-    treeherder:
-        platform: other/opt
-        tier: 2
-        kind: other
-    worker:
-        max-run-time: 3600
-        docker-image: {in-tree: github-sync}
-    run:
-        sparse-profile: github-sync
-        using: run-task
-
-jobs:
-    webrender:
-        description: Sync webrender to github mirror
-        secret: gecko/gfx-github-sync/token
-        run:
-            command: '$GECKO_PATH/tools/github-sync/sync-to-github.sh webrender gfx/wr servo/webrender @bors-servo'
-        when:
-            files-changed:
-                - 'gfx/wr/**'
-        treeherder:
-            symbol: GhS(wr)
-
-    qcms:
-        description: Sync qcms to github mirror
-        secret: gecko/gfx-github-sync/token
-        run:
-            command: '$GECKO_PATH/tools/github-sync/sync-to-github.sh qcms gfx/qcms FirefoxGraphics/qcms @jrmuizel'
-        when:
-            files-changed:
-                - 'gfx/qcms/**'
-        treeherder:
-            symbol: GhS(qcms)
diff --git a/taskcluster/ci/config.yml b/taskcluster/config.yml
index a26eb9818d..3c3ad2f5f4 100644
--- a/taskcluster/ci/config.yml
+++ b/taskcluster/config.yml
@@ -53,7 +53,7 @@ treeherder:
         'M-condprof': "Mochitests with conditioned profile"
         'M-condprof-cf': "Mochitests confirm failure with conditioned profile"
         'M-fis-hv': "Mochitests that run on Fission with isolateHighValue isolation strategy (Android-specific)"
-        'M-fis-hv-cf': "Mochitests confirm failure that run on Fission with isolateHighValue isolation strategy (Android-specific)"
+        'M-fis-hv-cf': "Mochitests confirm failure with Fission and isolateHighValue isolation strategy (Android-specific)"
         'M-headless': 'Headless Mochitests'
         'M-headless-cf': 'Headless Mochitests confirm failure'
         'M-headless-spi-nw': 'Headless Mochitests with fission and socketprocess networking.'
@@ -77,7 +77,7 @@ treeherder:
         'M-nofis': 'Mochitests without fission enabled'
         'M-nofis-cf': 'Mochitests confirm failure without fission enabled'
         'M-nofis-ship': "Mochitests without fission and with SHIP (session history in parent) enabled (Android-specific)"
-        'M-nofis-ship-cf': "Mochitests confirm failure without fission and with SHIP (session history in parent) enabled (Android-specific)"
+        'M-nofis-ship-cf': "Mochitests confirm failure: no fission + with SHIP (session history in parent) on (Android-only)"
         'M-spi': 'Mochitests with socket process'
         'M-spi-cf': 'Mochitests confirm failure with socket process'
         'M-spi-nofis': 'Mochitests with socket process without fission enabled'
@@ -113,10 +113,12 @@ treeherder:
         'Pup': "Puppeteer tests"
         'R': 'Reftests'
         'R-cf': 'Reftests confirm failure'
+        'R-s': 'Reftest snapshot'
+        'R-s-cf': 'Reftest snapshot with confirm failure'
         'R-nofis': 'Reftests without fission enabled'
         'R-nofis-cf': 'Reftests confirm failure without fission enabled'
         'R-nofis-ship': 'Reftests without fission and with SHIP (session history in parent) enabled (Android specific)'
-        'R-nofis-ship-cf': 'Reftests confirm failure without fission and with SHIP (session history in parent) enabled (Android specific)'
+        'R-nofis-ship-cf': 'Reftests confirm failure: no fission + with SHIP (session history in parent) on (Android-only)'
         'R-swr': 'Reftests with software webrender enabled'
         'R-swr-cf': 'Reftests confirm failure with software webrender enabled'
         'R-swr-nofis': 'Reftests with software webrender enabled without fission enabled'
@@ -146,6 +148,8 @@ treeherder:
         'W-cf': 'Web platform tests confirm failure'
         'W-nofis': 'Web platform tests without fission enabled'
         'W-nofis-cf': 'Web platform tests confirm failure without fission enabled'
+        'W-nofis-ship': 'Web platform tests without fission and with SHIP enabled'
+        'W-nofis-ship-cf': 'Web platform tests confirm failure without fission and with SHIP enabled'
         'W-headless': 'Headless web platform tests'
         'W-headless-cf': 'Headless web platform tests confirm failure'
         'W-swr-nofis': 'Web platform tests with software webrender enabled without fission enabled'
@@ -162,7 +166,7 @@ treeherder:
         'X-nofis': 'Xpcshell tests without fission enabled'
         'X-nofis-cf': 'Xpcshell tests confirm failure without fission enabled'
         'X-nofis-ship': 'Xpcshell tests without fission and with SHIP (session history in parent) enabled (Android specific)'
-        'X-nofis-ship-cf': 'Xpcshell tests confirm failure without fission and with SHIP (session history in parent) enabled (Android specific)'
+        'X-nofis-ship-cf': 'Xpcshell confirm failure: no fission + with SHIP (session history in parent) on (Android-only)'
         'X-spi-nw': 'Xpcshell tests with networking on socket process'
         'X-spi-nw-cf': 'Xpcshell tests confirm failure with networking on socket process'
         'X-spi-nw-nofis': 'Xpcshell tests with networking on socket process without fission enabled'
@@ -233,7 +237,6 @@ treeherder:
         'test-info': 'Test manifest skip/fail information'
         'condprof': 'Conditioned Profile Builder'
         'doc': 'Documentation'
-        'GhS': 'GitHub Synchronization'
         'perftest': 'Performance tests'
         'perftest-detect': 'Performance regression detection tooling'
         'perftest-chrome': 'Performance tests using Chrone'
@@ -279,6 +282,7 @@ treeherder:
         'browser-tabstray': 'browser-tabstray'
         'browser-thumbnails': 'browser-thumbnails'
         'browser-toolbar': 'browser-toolbar'
+        'browser-toolbar2': 'browser-toolbar2'
         'compose-awesomebar': 'compose-engine'
         'compose-browser-toolbar': 'awesomebar-browser-toolbar'
         'compose-engine': 'compose-engine'
@@ -800,6 +804,22 @@ workers:
             implementation: scriptworker-pushapk
             os: scriptworker
             worker-type: '{trust-domain}-{level}-pushapk'
+        pushflatpak:
+            provisioner: scriptworker-k8s
+            implementation: push-flatpak
+            os: scriptworker
+            worker-type:
+                by-release-level:
+                    staging: '{trust-domain}-1-pushflatpak'
+                    production: '{trust-domain}-3-pushflatpak'
+        pushmsix:
+            provisioner: scriptworker-k8s
+            implementation: push-msix
+            os: scriptworker
+            worker-type:
+                by-release-level:
+                    staging: '{trust-domain}-1-pushmsix'
+                    production: '{trust-domain}-3-pushmsix'
         tree:
             provisioner: scriptworker-k8s
             implementation: treescript
diff --git a/taskcluster/docker/debian-repackage/Dockerfile b/taskcluster/docker/debian-repackage/Dockerfile
index ae257931d4..f068731b58 100644
--- a/taskcluster/docker/debian-repackage/Dockerfile
+++ b/taskcluster/docker/debian-repackage/Dockerfile
@@ -3,22 +3,16 @@ MAINTAINER Mozilla Releng <release@mozilla.com>
 
 VOLUME /builds/worker/workspace
 
-# At the moment the Firefox build baseline is jessie.
-# Things in the build/CI system that run in the task's container
-# (mach, run-task, etc.) do not support jessie.
-# There's also no jessie `base` images or packages generated in the CI.
-# To generate Firefox Debian packages compatible with the baseline
-# we bootstrap basic i386 and amd64 jessie systems on bullseye.
-# We use these to generate shared library dependencies in jessie using chroot.
-# python/mozbuild/mozbuild/repackaging/deb.py checks for jessie systems
-# bootstrapped under /srv/jessie-i386 and /srv/jessie-amd64
-# If they aren't there, deb.py runs the repackage in the working directory without using chroot.
-# To keep the build and repackage enviroments consistent the Debian baseline used
-# here (jessie) should be synchronized with the baseline used in
-# taskcluster/scripts/misc/build-sysroot.sh
+# At the moment the Firefox build sysroot for i386 and amd64 use jessie and arm64 uses buster.
+# To generate Firefox Debian packages we bootstrap jessie and buster sysroots.
+# We use these sysroots to generate shared library dependencies for
+# i386 (jessie), amd64 (jessie), and arm64 (buster) packages.
+# To keep the build and repackage enviroments consistent the Debian distributions used by the sysroots
+# created here should match the distributions used by the sysroots created in taskcluster/scripts/misc/build-sysroot.sh
 ARG TASKCLUSTER_ROOT_URL
 ARG DOCKER_IMAGE_PACKAGES
 RUN /usr/local/sbin/setup_packages.sh $TASKCLUSTER_ROOT_URL $DOCKER_IMAGE_PACKAGES && \
+    dpkg --add-architecture arm64 && \
     apt-get update && \
     apt-get install debootstrap && set -xe && \
     for arch in i386 amd64; do \
@@ -30,6 +24,20 @@ RUN /usr/local/sbin/setup_packages.sh $TASKCLUSTER_ROOT_URL $DOCKER_IMAGE_PACKAG
         --verbose \
         jessie \
         /srv/jessie-$arch \
-        https://archive.debian.org/debian; \
+        https://archive.debian.org/debian || (echo "Debootstrap failed, outputting log:" && cat /srv/jessie-$arch/debootstrap/debootstrap.log && exit 1); \
     done && \
+    # bootstrap a buster/amd64 root to generate an arm64 .deb package.
+    debootstrap \
+    --arch=amd64 \
+    --variant=buildd \
+    --include=debhelper,binutils-multiarch,binutils-aarch64-linux-gnu \
+    --keyring=/usr/share/keyrings/debian-archive-buster-stable.gpg \
+    --verbose \
+    buster \
+    /srv/buster-amd64 \
+    http://deb.debian.org/debian || (echo "Debootstrap failed, outputting log:" && cat /srv/buster-amd64/debootstrap/debootstrap.log && exit 1) && \
+    chroot /srv/buster-amd64 /bin/bash -c "\
+        dpkg --add-architecture arm64 && \
+        apt-get update && \
+        apt-get install -y libasound2:arm64 libgtk-3-0:arm64 libx11-xcb1:arm64 libxtst6:arm64" && \
     /usr/local/sbin/clean_packages.sh $DOCKER_IMAGE_PACKAGES
diff --git a/taskcluster/docker/github-sync/Dockerfile b/taskcluster/docker/github-sync/Dockerfile
deleted file mode 100644
index bff131ad7b..0000000000
--- a/taskcluster/docker/github-sync/Dockerfile
+++ /dev/null
@@ -1,14 +0,0 @@
-FROM $DOCKER_IMAGE_PARENT
-MAINTAINER Kartikaya Gupta <kgupta@mozilla.com>
-
-VOLUME /builds/worker/checkouts
-VOLUME /builds/worker/workspace
-VOLUME /builds/worker/tooltool-cache
-VOLUME /builds/worker/.ghsync
-
-ADD prepare.sh /setup/prepare-docker.sh
-ADD requirements.txt /setup/requirements.txt
-RUN /bin/bash /setup/prepare-docker.sh /setup/requirements.txt && rm -R /setup
-
-# Set a default command useful for debugging
-CMD ["/bin/bash", "--login"]
diff --git a/taskcluster/docker/github-sync/prepare.sh b/taskcluster/docker/github-sync/prepare.sh
deleted file mode 100755
index 6c0be27168..0000000000
--- a/taskcluster/docker/github-sync/prepare.sh
+++ /dev/null
@@ -1,31 +0,0 @@
-#!/usr/bin/env bash
-
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-set -o errexit
-set -o nounset
-set -o pipefail
-set -o xtrace
-
-test "$(whoami)" == 'root'
-
-# Install stuff we need
-apt-get -y update
-apt-get install -y \
-    cmake \
-    curl \
-    gcc \
-    git \
-    g++ \
-    libffi-dev \
-    libgit2-dev \
-    libssl-dev \
-    python3 \
-    python3-dev \
-    python3-pip \
-    python3-setuptools
-
-# Python packages
-pip3 install --break-system-packages -r "$1"
diff --git a/taskcluster/docker/github-sync/requirements.txt b/taskcluster/docker/github-sync/requirements.txt
deleted file mode 100644
index 13fd42681d..0000000000
--- a/taskcluster/docker/github-sync/requirements.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-requests == 2.21.0
-pygit2 == 1.11.1
-python-hglib == 2.6.1
diff --git a/taskcluster/docker/sentry/Dockerfile b/taskcluster/docker/sentry/Dockerfile
index 2f606c5529..c07fdd3961 100644
--- a/taskcluster/docker/sentry/Dockerfile
+++ b/taskcluster/docker/sentry/Dockerfile
@@ -1,5 +1,5 @@
 FROM $DOCKER_IMAGE_PARENT
-LABEL maintainer="Mitchell Hentges mhentges@mozilla.com"
+LABEL maintainer="Alex Hochheiden ahochheiden@mozilla.com"
 
 VOLUME  /builds/worker/checkouts
 
diff --git a/taskcluster/docker/snap-coreXX-build/snap-tests/README.md b/taskcluster/docker/snap-coreXX-build/snap-tests/README.md
index 73f78c72bc..bdc79dbe4b 100644
--- a/taskcluster/docker/snap-coreXX-build/snap-tests/README.md
+++ b/taskcluster/docker/snap-coreXX-build/snap-tests/README.md
@@ -16,6 +16,10 @@ inspecting the browser at the end of a test.
 Data URL containing the diff screenshot will be dumped to stdout/stderr when
 `TEST_DUMP_DIFF` is set in the environment.
 
+A recording of the desktop can be captured via GNOME Screencast feature by
+passing `TEST_RECORD_SCREEN=true` in the enviromnent. Upon completion of the
+task it should upload a WebM file.
+
 Updating reference screenshots
 ==============================
  - `./mach try fuzzy --push-to-lando --full --env TEST_COLLECT_REFERENCE=1 -q "'snap-upstream-test"`
diff --git a/taskcluster/docker/snap-coreXX-build/snap-tests/record.py b/taskcluster/docker/snap-coreXX-build/snap-tests/record.py
new file mode 100644
index 0000000000..51fe47f6d8
--- /dev/null
+++ b/taskcluster/docker/snap-coreXX-build/snap-tests/record.py
@@ -0,0 +1,24 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+import os
+import time
+
+import dbus
+
+session_bus = dbus.SessionBus()
+session_bus.call_blocking(
+    "org.gnome.Shell.Screencast",
+    "/org/gnome/Shell/Screencast",
+    "org.gnome.Shell.Screencast",
+    "Screencast",
+    signature="sa{sv}",
+    args=[
+        os.path.join(os.environ.get("ARTIFACT_DIR", ""), "video_%d_%t.webm"),
+        {"draw-cursor": True, "framerate": 35},
+    ],
+)
+
+while True:
+    time.sleep(30)
diff --git a/taskcluster/docker/snap-coreXX-build/snap-tests/tests.sh b/taskcluster/docker/snap-coreXX-build/snap-tests/tests.sh
index 854ef2c9af..3412d04727 100755
--- a/taskcluster/docker/snap-coreXX-build/snap-tests/tests.sh
+++ b/taskcluster/docker/snap-coreXX-build/snap-tests/tests.sh
@@ -60,6 +60,16 @@ if [ -n "${MOZ_LOG}" ]; then
   export MOZ_LOG_FILE="${ARTIFACT_DIR}/gecko-log"
 fi
 
+RECORD_SCREEN_PID=0
+if [ "${TEST_RECORD_SCREEN}" = "true" ]; then
+  python3 record.py &
+  RECORD_SCREEN_PID=$!
+  echo "Recording with PID ${RECORD_SCREEN_PID}"
+
+  trap 'echo [EXIT] Stopping screen recording from PID ${RECORD_SCREEN_PID} && kill ${RECORD_SCREEN_PID}' EXIT
+  trap 'echo [ERR] Stopping screen recording from PID ${RECORD_SCREEN_PID} && kill ${RECORD_SCREEN_PID}' ERR
+fi;
+
 if [ "${SUITE}" = "basic" ]; then
   sed -e "s/#RUNTIME_VERSION#/${RUNTIME_VERSION}/#" < basic_tests/expectations.json.in > basic_tests/expectations.json
   python3 basic_tests.py basic_tests/expectations.json
diff --git a/taskcluster/docker/system-symbols-linux-scraper/Dockerfile b/taskcluster/docker/system-symbols-linux-scraper/Dockerfile
index edafc97c83..e9785c93c1 100644
--- a/taskcluster/docker/system-symbols-linux-scraper/Dockerfile
+++ b/taskcluster/docker/system-symbols-linux-scraper/Dockerfile
@@ -12,7 +12,7 @@ VOLUME /builds/worker/checkouts
 
 RUN apt-get update && \
     apt-get install --no-install-recommends -y \
-        7zip binutils build-essential cpio curl debuginfod elfutils flatpak jq \
+        file 7zip binutils build-essential cpio curl debuginfod elfutils flatpak jq \
         libxml2-utils python3-pip rpm2cpio squashfs-tools unzip wget zip && \
     apt-get autoremove -y && rm -rf /var/lib/apt/lists/*
 
diff --git a/taskcluster/docker/system-symbols-linux-scraper/README b/taskcluster/docker/system-symbols-linux-scraper/README
new file mode 100644
index 0000000000..ac37a2d3f3
--- /dev/null
+++ b/taskcluster/docker/system-symbols-linux-scraper/README
@@ -0,0 +1,64 @@
+Performing a (re)bootstrapping of symbols scraping process
+==========================================================
+
+Whenever for any reason the symbol scraping process might have been faulty long
+enough, we can end up (currently) in a situation where the recorded status of
+`SHA256SUMS.zip` on the TaskCluster index is inconsistent with what we really
+processed.
+
+This document aims at explaining what needs to be done and where to recover
+from that state (this is based on the experience from bug 1893156).
+
+First, you need to identify since how long the problem has been present. As of
+now there is no really better tooling than processing manually the cron tasks
+logs and see when it started to fail.
+
+Once you have identified a date, the next step is to work on the bootstrapping
+content. As visible in
+https://searchfox.org/mozilla-central/rev/f6e3b81aac49e602f06c204f9278da30993cdc8a/taskcluster/docker/system-symbols-linux-scraper/run.sh#62,
+the first source of truth is the gh-pages branch of the symbol-scrapers github
+repository: https://github.com/mozilla/symbol-scrapers/tree/gh-pages.  This
+source of truth is evaluated ONLY if the TaskCluster index is NOT present. The
+route is being computed from the running task's definition:
+https://searchfox.org/mozilla-central/rev/f6e3b81aac49e602f06c204f9278da30993cdc8a/taskcluster/docker/system-symbols-linux-scraper/run.sh#14
+from which we ONLY consider the `latest` alias.
+
+As of today the index is for example for debian:
+index.gecko.v2.mozilla-central.latest.system-symbols.debian and thus one can
+explore the content at
+https://firefox-ci-tc.services.mozilla.com/tasks/index/gecko.v2.mozilla-central.latest.system-symbols.debian,
+other means of browsing including pushdate allows to find e.g.,
+https://firefox-ci-tc.services.mozilla.com/tasks/index/gecko.v2.mozilla-central.pushdate.2024.04.20.20240420094034.system-symbols/debian
+from which we can get a link to the sums file:
+https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.v2.mozilla-central.pushdate.2024.04.20.20240420094034.system-symbols.debian/artifacts/public%2Fbuild%2FSHA256SUMS.zip
+
+Once you have identified WHEN the problem arose, you can take the above URL
+(adapting with the correct date) and adapting to the various distributions.
+
+Make sure you have an uptodate git clone of the mozilla/symbol-scrapers
+repository, checkout a new branch out of the gh-pages tree, and you can proceed
+to the data extraction following (example with a different date):
+  for distro in alpine archlinux debian fedora firefox-flatpak firefox-snap gnome-sdk-snap mint opensuse ubuntu; do
+    wget https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.v2.mozilla-central.pushdate.2024.02.07.latest.system-symbols.$distro/artifacts/public%2Fbuild%2FSHA256SUMS.zip -O $distro/SHA256SUMS.zip;
+  done;
+  mv archlinux/SHA256SUMS.zip arch/
+
+Please note that there's a slight difference in naming, archlinux vs arch.
+Please note other distros might have been added since so you need to adapt.
+
+Send a pull request once this is OK, make it reviewed or merge it.
+
+As of now, the content of the boostrapping process is in the state we want, but
+if you run a symbols scraping task, it will still pull data from the
+TaskCluster index.  This time, you need to use the index that refers to latest
+and NOT the pushdate or another one, so the index used in the example SHOULD be
+good. You just have to run deleteTask (with the appropriate credentials if you
+have them, or ask releng for help in #firefox-ci):
+  for distro in alpine archlinux debian fedora firefox-flatpak firefox-snap gnome-sdk-snap mint opensuse ubuntu; do
+    taskcluster api index deleteTask gecko.v2.mozilla-central.latest.system-symbols.$distro
+  done;
+
+From there, HTTP queries to (for the debian example)
+https://firefox-ci-tc.services.mozilla.com/tasks/index/gecko.v2.mozilla-central.latest.system-symbols.debian
+would return 404, which will make the symbol scraping tasks search its data on
+GitHub.
diff --git a/taskcluster/docker/updatebot/updatebot-version.sh b/taskcluster/docker/updatebot/updatebot-version.sh
index ea788dd130..0491fdf447 100644
--- a/taskcluster/docker/updatebot/updatebot-version.sh
+++ b/taskcluster/docker/updatebot/updatebot-version.sh
@@ -1,2 +1,2 @@
-export UPDATEBOT_REVISION=5cf21801808c95a3948916fd03f1001d964d796a
+export UPDATEBOT_REVISION=d7689dd2e47c6df15f5fece49a85a5297d4c4ff3
 
diff --git a/taskcluster/docker/updatebot/windows-setup.sh b/taskcluster/docker/updatebot/windows-setup.sh
index c04d0a6fbf..975aaea249 100644
--- a/taskcluster/docker/updatebot/windows-setup.sh
+++ b/taskcluster/docker/updatebot/windows-setup.sh
@@ -27,7 +27,7 @@ mv depot_tools.git depot_tools
 
 # Generating a new version of the preloaded depot_tools download can be done by:
 # 1) Running the task, uncommenting the variable assignment below, uncommenting the
-#    _GENERATE_DEPOT_TOOLS_BINARIES_ section in taskcluster/ci/updatebot/kind.yml,
+#    _GENERATE_DEPOT_TOOLS_BINARIES_ section in taskcluster/kinds/updatebot/kind.yml,
 #    and ensuring that an angle update will actually take place (so it downloads the depot_tools)
 # 2) Downloading and sanity-checking the depot_tools-preloaded-binaries-GIT_HASH-DATE.zip artifact
 # 3) Adding it to tooltool
@@ -121,7 +121,7 @@ if test -n "$GENERATE_DEPOT_TOOLS_BINARIES"; then
 
     # Convoluted way to get the git hash, because we don't have a .git directory
     # Adding extra print statements just in case we need to debug it
-    GIT_HASH=$(grep depot_tools -A 1 "$GECKO_PATH/taskcluster/ci/fetch/updatebot.yml" | tee /dev/tty | grep revision | tee /dev/tty | awk -F': *' '{print $2}' | tee /dev/tty)
+    GIT_HASH=$(grep depot_tools -A 1 "$GECKO_PATH/taskcluster/kinds/fetch/updatebot.yml" | tee /dev/tty | grep revision | tee /dev/tty | awk -F': *' '{print $2}' | tee /dev/tty)
     DATE=$(date -I)
     mv depot_tools-preloaded-binaries.zip "depot_tools-preloaded-binaries-$GIT_HASH-$DATE.zip"
 
diff --git a/taskcluster/docs/howto/index.rst b/taskcluster/docs/howto/index.rst
index ab1010666b..c3a03ef166 100644
--- a/taskcluster/docs/howto/index.rst
+++ b/taskcluster/docs/howto/index.rst
@@ -35,7 +35,7 @@ Changing Test Characteristics
 .............................
 
 First, find the test description.  This will be in
-``taskcluster/ci/*/tests.yml``, for the appropriate kind (consult
+``taskcluster/kinds/*/tests.yml``, for the appropriate kind (consult
 :ref:`kinds`).  You will find a YAML stanza for each test suite, and each
 stanza defines the test's characteristics.  For example, the ``chunks``
 property gives the number of chunks to run.  This can be specified as a simple
@@ -65,7 +65,7 @@ Adding a Test Suite
 To add a new test suite, you will need to know the proper mozharness invocation
 for that suite, and which kind it fits into (consult :ref:`kinds`).
 
-Add a new stanza to ``taskcluster/ci/<kind>/tests.yml``, copying from the other
+Add a new stanza to ``taskcluster/kinds/<kind>/tests.yml``, copying from the other
 stanzas in that file.  The meanings should be clear, but authoritative
 documentation is in
 ``taskcluster/gecko_taskgraph/transforms/test/__init__.py`` should you need
diff --git a/taskcluster/docs/kinds.rst b/taskcluster/docs/kinds.rst
index b54f95f0fa..76edaaa511 100644
--- a/taskcluster/docs/kinds.rst
+++ b/taskcluster/docs/kinds.rst
@@ -684,7 +684,7 @@ diffoscope
 ----------
 Tasks used to compare pairs of Firefox builds using https://diffoscope.org/.
 As of writing, this is mainly meant to be used in try builds, by editing
-taskcluster/ci/diffoscope/kind.yml for your needs.
+taskcluster/kinds/diffoscope/kind.yml for your needs.
 
 addon
 -----
@@ -703,11 +703,6 @@ webrender
 Tasks used to do testing of WebRender standalone (without gecko). The
 WebRender code lives in gfx/wr and has its own testing infrastructure.
 
-github-sync
-------------
-Tasks used to do synchronize parts of Gecko that have downstream GitHub
-repositories.
-
 instrumented-build
 ------------------
 Tasks that generate builds with PGO instrumentation enabled. This is an
diff --git a/taskcluster/docs/kinds/test.rst b/taskcluster/docs/kinds/test.rst
index 20d3635c5c..b577a4a993 100644
--- a/taskcluster/docs/kinds/test.rst
+++ b/taskcluster/docs/kinds/test.rst
@@ -120,7 +120,7 @@ manifest conditions pending the triage owner / manager to review.
 Please subscribe to alerts from `firefox-ci <https://groups.google.com/a/mozilla.com/g/firefox-ci>`
 group in order to be aware of changes to the CI, scheduling, or the policy.
 
-.. _variants.yml: https://searchfox.org/mozilla-central/source/taskcluster/ci/test/variants.yml
+.. _variants.yml: https://searchfox.org/mozilla-central/source/taskcluster/kinds/test/variants.yml
 .. _json-e: https://json-e.js.org/
 
 
diff --git a/taskcluster/docs/partner-attribution.rst b/taskcluster/docs/partner-attribution.rst
index f83eabb005..c283d4b529 100644
--- a/taskcluster/docs/partner-attribution.rst
+++ b/taskcluster/docs/partner-attribution.rst
@@ -27,7 +27,7 @@ partner repacks.
 logic. It's usually looked up during the release promotion action task, using the Github
 GraphQL API in the `get_partner_config_by_url()
 <python/taskgraph.util.html#taskgraph.util.partners.get_partner_config_by_url>`_ function, with the
-url defined in `taskcluster/ci/config.yml <https://searchfox.org/mozilla-central/search?q=partner-urls&path=taskcluster%2Fci%2Fconfig.yml&case=true&regexp=false&redirect=true>`_.
+url defined in `taskcluster/config.yml <https://searchfox.org/mozilla-central/search?q=partner-urls&path=taskcluster%2Fconfig.yml&case=true&regexp=false&redirect=true>`_.
 
 ``release_partner_build_number`` is an integer used to create unique upload paths in the firefox
 candidates directory, while ``release_partners`` is a list of partners that should be
diff --git a/taskcluster/docs/partner-repacks.rst b/taskcluster/docs/partner-repacks.rst
index 3ae352e06d..6aa3db7da7 100644
--- a/taskcluster/docs/partner-repacks.rst
+++ b/taskcluster/docs/partner-repacks.rst
@@ -40,7 +40,7 @@ release. They're both true for Firefox betas >= b8 and releases, but otherwise d
 logic. It's usually looked up during the release promotion action task, using the Github
 GraphQL API in the `get_partner_config_by_url()
 <python/taskgraph.util.html#taskgraph.util.partners.get_partner_config_by_url>`_ function, with the
-url defined in `taskcluster/ci/config.yml <https://searchfox
+url defined in `taskcluster/config.yml <https://searchfox
 .org/mozilla-release/search?q=regexp%3A^partner+path%3Aconfig.yml&redirect=true>`_.
 
 ``release_partner_build_number`` is an integer used to create unique upload paths in the firefox
diff --git a/taskcluster/docs/taskgraph.rst b/taskcluster/docs/taskgraph.rst
index 5b3ac83643..dbb74f3499 100644
--- a/taskcluster/docs/taskgraph.rst
+++ b/taskcluster/docs/taskgraph.rst
@@ -32,7 +32,7 @@ Kinds
 Generation starts with "kinds". These are yaml files that denote groupings of
 tasks that are loosely related to one another. For example, in Gecko there are
 ``build`` and ``test`` kinds. Each kind has its own directory under
-`taskcluster/ci`_ which contains a ``kind.yml`` file.
+`taskcluster/kinds`_ which contains a ``kind.yml`` file.
 
 For more information on kinds, see Taskgraph's `kind documentation`_. For a
 list of available kinds in ``mozilla-central``, see the :doc:`kinds reference
@@ -114,7 +114,7 @@ Graph Configuration
 
 There are several configuration settings that are pertain to the entire
 taskgraph. These are specified in :file:`config.yml` at the root of the
-taskgraph configuration (typically :file:`taskcluster/ci/`). The available
+taskgraph configuration (typically :file:`taskcluster`). The available
 settings are documented inline in `taskcluster/gecko_taskgraph/config.py
 <https://searchfox.org/mozilla-central/source/taskcluster/gecko_taskgraph/config.py>`_.
 
@@ -131,7 +131,7 @@ For more information, see Taskgraph's `actions documentation`_.
 
 .. _graph generation documentation: https://taskcluster-taskgraph.readthedocs.io/en/latest/concepts/task-graphs.html
 .. _this guide: https://taskcluster-taskgraph.readthedocs.io/en/latest/howto/run-locally.html
-.. _taskcluster/ci: https://searchfox.org/mozilla-central/source/taskcluster/ci
+.. _taskcluster/kinds: https://searchfox.org/mozilla-central/source/taskcluster/kinds
 .. _kind documentation: https://taskcluster-taskgraph.readthedocs.io/en/latest/concepts/kind.html
 .. _loader documentation: https://taskcluster-taskgraph.readthedocs.io/en/latest/concepts/loading.html
 .. _transforms documentation: https://taskcluster-taskgraph.readthedocs.io/en/latest/concepts/transforms.html
diff --git a/taskcluster/docs/versioncontrol.rst b/taskcluster/docs/versioncontrol.rst
index 835f8915cf..c187ea7f64 100644
--- a/taskcluster/docs/versioncontrol.rst
+++ b/taskcluster/docs/versioncontrol.rst
@@ -35,7 +35,7 @@ The locations are as follows:
 Debian Packages for Debian and Ubuntu Based Docker Images
 ---------------------------------------------------------
 
-``taskcluster/ci/packages/debian.yml`` and ``taskcluster/ci/packages/ubuntu.yml``
+``taskcluster/kinds/packages/debian.yml`` and ``taskcluster/kinds/packages/ubuntu.yml``
 define custom Debian packages for Mercurial. These are installed in various
 Docker images.
 
diff --git a/taskcluster/gecko_taskgraph/config.py b/taskcluster/gecko_taskgraph/config.py
index 7b6237f9fb..df4a5665e3 100644
--- a/taskcluster/gecko_taskgraph/config.py
+++ b/taskcluster/gecko_taskgraph/config.py
@@ -4,6 +4,7 @@
 
 from taskgraph.util.schema import Schema, optionally_keyed_by
 from voluptuous import Any, Optional, Required
+from voluptuous.validators import Length
 
 graph_config_schema = Schema(
     {
@@ -20,7 +21,7 @@ graph_config_schema = Schema(
         Required("product-dir"): str,
         Required("treeherder"): {
             # Mapping of treeherder group symbols to descriptive names
-            Required("group-names"): {str: str}
+            Required("group-names"): {str: Length(max=100)}
         },
         Required("index"): {Required("products"): [str]},
         Required("try"): {
diff --git a/taskcluster/gecko_taskgraph/files_changed.py b/taskcluster/gecko_taskgraph/files_changed.py
index c814df0806..0352fb9d7e 100644
--- a/taskcluster/gecko_taskgraph/files_changed.py
+++ b/taskcluster/gecko_taskgraph/files_changed.py
@@ -16,7 +16,7 @@ from mozpack.path import match as mozpackmatch
 from mozversioncontrol import InvalidRepoPath, get_repository_object
 
 from gecko_taskgraph import GECKO
-from gecko_taskgraph.util.hg import get_json_automationrelevance
+from gecko_taskgraph.util.hg import get_json_pushchangedfiles
 
 logger = logging.getLogger(__name__)
 
@@ -27,9 +27,8 @@ def get_changed_files(repository, revision):
     Get the set of files changed in the push headed by the given revision.
     Responses are cached, so multiple calls with the same arguments are OK.
     """
-    contents = get_json_automationrelevance(repository, revision)
     try:
-        changesets = contents["changesets"]
+        return get_json_pushchangedfiles(repository, revision)["files"]
     except KeyError:
         # We shouldn't hit this error in CI.
         if os.environ.get("MOZ_AUTOMATION"):
@@ -39,17 +38,6 @@ def get_changed_files(repository, revision):
         # version control.
         return get_locally_changed_files(GECKO)
 
-    logger.debug("{} commits influencing task scheduling:".format(len(changesets)))
-    changed_files = set()
-    for c in changesets:
-        desc = ""  # Support empty desc
-        if c["desc"]:
-            desc = c["desc"].splitlines()[0].encode("ascii", "ignore")
-        logger.debug(" {cset} {desc}".format(cset=c["node"][0:12], desc=desc))
-        changed_files |= set(c["files"])
-
-    return changed_files
-
 
 def check(params, file_patterns):
     """Determine whether any of the files changed in the indicated push to
diff --git a/taskcluster/gecko_taskgraph/main.py b/taskcluster/gecko_taskgraph/main.py
index e261f26c80..c6d7a4a3c8 100644
--- a/taskcluster/gecko_taskgraph/main.py
+++ b/taskcluster/gecko_taskgraph/main.py
@@ -108,7 +108,7 @@ def get_filtered_taskgraph(taskgraph, tasksregex, exclude_keys):
             for key in exclude_keys:
                 obj = task_dict
                 attrs = key.split(".")
-                while attrs[0] in obj:
+                while obj and attrs[0] in obj:
                     if len(attrs) == 1:
                         del obj[attrs[0]]
                         break
@@ -386,10 +386,10 @@ def show_taskgraph(options):
     output_file = options["output_file"]
 
     if options["diff"]:
-        # --root argument is taskgraph's config at <repo>/taskcluster/ci
+        # --root argument is taskgraph's config at <repo>/taskcluster
         repo_root = os.getcwd()
         if options["root"]:
-            repo_root = f"{options['root']}/../.."
+            repo_root = f"{options['root']}/.."
         repo = get_repository(repo_root)
 
         if not repo.working_directory_clean():
@@ -707,7 +707,7 @@ def decision(options):
 @argument(
     "--root",
     "-r",
-    default="taskcluster/ci",
+    default="taskcluster",
     help="root of the taskgraph definition relative to topsrcdir",
 )
 def action_callback(options):
@@ -743,7 +743,7 @@ def action_callback(options):
 @argument(
     "--root",
     "-r",
-    default="taskcluster/ci",
+    default="taskcluster",
     help="root of the taskgraph definition relative to topsrcdir",
 )
 @argument(
diff --git a/taskcluster/gecko_taskgraph/manifests/firefox_candidates.yml b/taskcluster/gecko_taskgraph/manifests/firefox_candidates.yml
index af0ea79aa4..d847b4fcdc 100644
--- a/taskcluster/gecko_taskgraph/manifests/firefox_candidates.yml
+++ b/taskcluster/gecko_taskgraph/manifests/firefox_candidates.yml
@@ -62,6 +62,8 @@ platform_names:
             linux64-shippable: 'linux-x86_64'
             linux64-devedition: 'linux-x86_64'
             linux64-asan-reporter-shippable: 'linux-x86_64-asan-reporter'
+            linux64-aarch64-shippable: 'linux-aarch64'
+            linux64-aarch64-devedition: 'linux-aarch64'
             macosx64-shippable: 'mac'
             macosx64-devedition: 'mac'
             win32-shippable: 'win32'
@@ -78,6 +80,8 @@ platform_names:
             linux64-shippable: 'linux64'
             linux64-devedition: 'linux64-devedition'
             linux64-asan-reporter-shippable: 'linux-x86_64-asan-reporter'
+            linux64-aarch64-shippable: 'linux64-aarch64'
+            linux64-aarch64-devedition: 'linux64-aarch64-devedition'
             macosx64-shippable: 'macosx64'
             macosx64-devedition: 'macosx64-devedition'
             win32-shippable: 'win32'
@@ -94,6 +98,8 @@ platform_names:
             linux64-shippable: 'linux64'
             linux64-devedition: 'linux64'
             linux64-asan-reporter-shippable: 'linux-x86_64-asan-reporter'
+            linux64-aarch64-shippable: 'linux64-aarch64'
+            linux64-aarch64-devedition: 'linux64-aarch64'
             macosx64-shippable: 'macosx64'
             macosx64-devedition: 'macosx64'
             win32-shippable: 'win32'
diff --git a/taskcluster/gecko_taskgraph/manifests/firefox_candidates_checksums.yml b/taskcluster/gecko_taskgraph/manifests/firefox_candidates_checksums.yml
index 43ba4cbf15..7ca17662e2 100644
--- a/taskcluster/gecko_taskgraph/manifests/firefox_candidates_checksums.yml
+++ b/taskcluster/gecko_taskgraph/manifests/firefox_candidates_checksums.yml
@@ -51,6 +51,8 @@ platform_names:
             linux64-shippable: 'linux-x86_64'
             linux64-devedition: 'linux-x86_64'
             linux64-asan-reporter-shippable: 'linux-x86_64-asan-reporter'
+            linux64-aarch64-shippable: 'linux-aarch64'
+            linux64-aarch64-devedition: 'linux-aarch64'
             macosx64-shippable: 'mac'
             macosx64-devedition: 'mac'
             win32-shippable: 'win32'
diff --git a/taskcluster/gecko_taskgraph/manifests/firefox_nightly.yml b/taskcluster/gecko_taskgraph/manifests/firefox_nightly.yml
index 421caba08f..60c39e7c53 100644
--- a/taskcluster/gecko_taskgraph/manifests/firefox_nightly.yml
+++ b/taskcluster/gecko_taskgraph/manifests/firefox_nightly.yml
@@ -57,6 +57,8 @@ platform_names:
             linux-devedition: 'linux-i686'
             linux64-shippable: 'linux-x86_64'
             linux64-devedition: 'linux-x86_64'
+            linux64-aarch64-shippable: 'linux-aarch64'
+            linux64-aarch64-devedition: 'linux-aarch64'
             linux64-asan-reporter-shippable: 'linux-x86_64-asan-reporter'
             macosx64-shippable: 'mac'
             macosx64-devedition: 'mac'
@@ -74,6 +76,8 @@ platform_names:
             linux64-asan-reporter-shippable: 'linux64-asan-reporter'
             linux64-shippable: 'linux64'
             linux64-devedition: 'linux64'
+            linux64-aarch64-shippable: 'linux64-aarch64'
+            linux64-aarch64-devedition: 'linux64-aarch64'
             macosx64-shippable: 'macosx64'
             macosx64-devedition: 'macosx64'
             win32-shippable: 'win32'
@@ -127,19 +131,10 @@ mapping:
         checksums_path: KEY
         only_for_platforms:
             - linux64-shippable
+            - linux64-aarch64-shippable
         destinations:
             - ${year}/${month}/${upload_date}-${branch}
             - latest-${branch}
-    target.common.tests.tar.gz:
-        <<: *default
-        description: "Mixture of reftests, mochitests, UI and others, commonly bundled together in a test suite"
-        pretty_name: firefox-${version}.${locale}.${filename_platform}.common.tests.tar.gz
-        checksums_path: firefox-${version}.${locale}.${filename_platform}.common.tests.tar.gz
-    target.cppunittest.tests.tar.gz:
-        <<: *default
-        description: "C++ unittests related in-tree test infrastructure"
-        pretty_name: firefox-${version}.${locale}.${filename_platform}.cppunittest.tests.tar.gz
-        checksums_path: firefox-${version}.${locale}.${filename_platform}.cppunittest.tests.tar.gz
     target.crashreporter-symbols.zip:
         <<: *default
         description: "Crashreporter symbols to be consumed by Socorro"
@@ -153,51 +148,16 @@ mapping:
         description: "Various compile and moz_app flags baked together in a json file"
         pretty_name: firefox-${version}.${locale}.${filename_platform}.json
         checksums_path: firefox-${version}.${locale}.${filename_platform}.json
-    target.mochitest.tests.tar.gz:
-        <<: *default
-        description: "Results for running the mochitest testing framework via Javascript function calls"
-        pretty_name: firefox-${version}.${locale}.${filename_platform}.mochitest.tests.tar.gz
-        checksums_path: firefox-${version}.${locale}.${filename_platform}.mochitest.tests.tar.gz
     target.mozinfo.json:
         <<: *default
         description: "Various compile and moz_app flags baked together in a json file"
         pretty_name: firefox-${version}.${locale}.${filename_platform}.mozinfo.json
         checksums_path: firefox-${version}.${locale}.${filename_platform}.mozinfo.json
-    target.reftest.tests.tar.gz:
-        <<: *default
-        description: "Results for running the reftest testing framework via display of two Web pages comparison"
-        pretty_name: firefox-${version}.${locale}.${filename_platform}.reftest.tests.tar.gz
-        checksums_path: firefox-${version}.${locale}.${filename_platform}.reftest.tests.tar.gz
-    target.talos.tests.tar.gz:
-        <<: *default
-        description: "Results for running the talos testing framework to measure performance"
-        pretty_name: firefox-${version}.${locale}.${filename_platform}.talos.tests.tar.gz
-        checksums_path: firefox-${version}.${locale}.${filename_platform}.talos.tests.tar.gz
-    target.awsy.tests.tar.gz:
-        <<: *default
-        description: "Results for running the awsy testing framework to track memory usage"
-        pretty_name: firefox-${version}.${locale}.${filename_platform}.awsy.tests.tar.gz
-        checksums_path: firefox-${version}.${locale}.${filename_platform}.awsy.tests.tar.gz
-    target.test_packages.json:
-        <<: *default
-        description: "File containing metadata about all other files and testing harnesses specifics"
-        pretty_name: firefox-${version}.${locale}.${filename_platform}.test_packages.json
-        checksums_path: firefox-${version}.${locale}.${filename_platform}.test_packages.json
     target.txt:
         <<: *default
         description: "File containing buildid and revision"
         pretty_name: firefox-${version}.${locale}.${filename_platform}.txt
         checksums_path: firefox-${version}.${locale}.${filename_platform}.txt
-    target.web-platform.tests.tar.gz:
-        <<: *default
-        description: "Results for running the webplatform testing framework to cover standard Web platform features"
-        pretty_name: firefox-${version}.${locale}.${filename_platform}.web-platform.tests.tar.gz
-        checksums_path: firefox-${version}.${locale}.${filename_platform}.web-platform.tests.tar.gz
-    target.xpcshell.tests.tar.gz:
-        <<: *default
-        description: "Results for running the xpcshell testing framework to enable XPConnect console application"
-        pretty_name: firefox-${version}.${locale}.${filename_platform}.xpcshell.tests.tar.gz
-        checksums_path: firefox-${version}.${locale}.${filename_platform}.xpcshell.tests.tar.gz
     target_info.txt:
         <<: *default
         description: "File containing the buildID"
@@ -226,6 +186,7 @@ mapping:
         only_for_platforms:
             - linux-shippable
             - linux64-shippable
+            - linux64-aarch64-shippable
             - macosx64-shippable
             - win64-shippable
             - win32-shippable
@@ -252,6 +213,8 @@ mapping:
         only_for_platforms:
             - linux-shippable
             - linux64-shippable
+            - linux64-aarch64-shippable
+            - linux64-aarch64-devedition
             - linux-devedition
             - linux64-devedition
         pretty_name: firefox-${version}.${locale}.langpack.deb
@@ -301,6 +264,7 @@ mapping:
         only_for_platforms:
             - linux-shippable
             - linux64-shippable
+            - linux64-aarch64-shippable
             - linux64-asan-reporter-shippable
         pretty_name: firefox-${version}.${locale}.${filename_platform}.tar.bz2
         checksums_path: firefox-${version}.${locale}.${filename_platform}.tar.bz2
@@ -322,6 +286,7 @@ mapping:
         only_for_platforms:
             - linux-shippable
             - linux64-shippable
+            - linux64-aarch64-shippable
             - linux64-asan-reporter-shippable
         pretty_name: firefox-${version}.${locale}.${filename_platform}.tar.bz2.asc
         checksums_path: firefox-${version}.${locale}.${filename_platform}.tar.bz2.asc
@@ -499,6 +464,7 @@ mapping:
         only_for_platforms:
             - linux-shippable
             - linux64-shippable
+            - linux64-aarch64-shippable
         pretty_name: firefox-${version}.${locale}.${filename_platform}.deb
         checksums_path: firefox-${version}.${locale}.${filename_platform}.deb
         update_balrog_manifest: false
diff --git a/taskcluster/gecko_taskgraph/manifests/firefox_nightly_checksums.yml b/taskcluster/gecko_taskgraph/manifests/firefox_nightly_checksums.yml
index f1b81572ab..caa31f556e 100644
--- a/taskcluster/gecko_taskgraph/manifests/firefox_nightly_checksums.yml
+++ b/taskcluster/gecko_taskgraph/manifests/firefox_nightly_checksums.yml
@@ -18,6 +18,8 @@ platform_names:
             linux-shippable: 'linux-i686'
             linux-devedition: 'linux-i686'
             linux64-shippable: 'linux-x86_64'
+            linux64-aarch64-shippable: 'linux-aarch64'
+            linux64-aarch64-devedition: 'linux-aarch64'
             linux64-devedition: 'linux-x86_64'
             linux64-asan-reporter-shippable: 'linux-x86_64-asan-reporter'
             macosx64-shippable: 'mac'
diff --git a/taskcluster/gecko_taskgraph/optimize/mozlint.py b/taskcluster/gecko_taskgraph/optimize/mozlint.py
new file mode 100644
index 0000000000..0fe42ea70d
--- /dev/null
+++ b/taskcluster/gecko_taskgraph/optimize/mozlint.py
@@ -0,0 +1,96 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import logging
+from pathlib import Path
+from typing import List, Union
+
+from mozlint.parser import Parser
+from mozlint.pathutils import filterpaths
+from taskgraph.optimize.base import OptimizationStrategy
+from taskgraph.util.path import match as match_path
+
+from gecko_taskgraph import GECKO
+
+logger = logging.getLogger(__name__)
+
+
+class TGMozlintParser(Parser):
+    """
+    Mozlint Parser that skips validation. This is needed because decision
+    tasks use sparse clones and the files themselves are not present.
+    """
+
+    def _validate(self, linter):
+        pass
+
+
+class SkipUnlessMozlint(OptimizationStrategy):
+    """
+    Optimization strategy for mozlint tests.
+
+    Uses the mozlint YAML file for each test to determine whether or not a test
+    should run.
+
+    Using:
+        - The optimization relies on having `files_changed` set in the decision task
+          parameters.
+        - Register with register_strategy. The argument is the path to MozLint YAML
+          configuration files ("/tools/lint" for mozilla-central):
+        - In source-test/mozlint.yml, set the optimization strategy for each job by filename:
+        - For Mozlint jobs that run multiple linters at once use a list of filenames:
+    """
+
+    def __init__(self, linters_path: str):
+        self.mozlint_parser = TGMozlintParser(GECKO)
+        self.linters_path = Path(GECKO) / linters_path
+
+    def should_remove_task(
+        self, task, params, mozlint_confs: Union[str, List[str]]
+    ) -> bool:
+        include = []
+        exclude = []
+        extensions = []
+        exclude_extensions = []
+        support_files = ["python/mozlint/**", "tools/lint/**"]
+
+        files_changed = params["files_changed"]
+
+        if isinstance(mozlint_confs, str):
+            mozlint_confs = [mozlint_confs]
+
+        for mozlint_conf in mozlint_confs:
+            mozlint_yaml = str(self.linters_path / mozlint_conf)
+            logger.info(f"Loading file patterns for {task.label} from {mozlint_yaml}.")
+            linter_config = self.mozlint_parser(mozlint_yaml)
+
+            for config in linter_config:
+                include += config.get("include", [])
+                exclude += config.get("exclude", [])
+                extensions += [e.strip(".") for e in config.get("extensions", [])]
+                exclude_extensions += [
+                    e.strip(".") for e in config.get("exclude_extensions", [])
+                ]
+                support_files += config.get("support-files", [])
+
+        # Support files may not be part of "include" patterns, so check first
+        # Do not remove (return False) if any changed
+        for pattern in set(support_files):
+            for path in files_changed:
+                if match_path(path, pattern):
+                    return False
+
+        to_lint, to_exclude = filterpaths(
+            GECKO,
+            list(files_changed),
+            include=include,
+            exclude=exclude,
+            extensions=extensions,
+            exclude_extensions=exclude_extensions,
+        )
+
+        # to_lint should be an empty list if there is nothing to check
+        if not to_lint:
+            return True
+        return False
diff --git a/taskcluster/gecko_taskgraph/optimize/schema.py b/taskcluster/gecko_taskgraph/optimize/schema.py
index a7f878cf60..a348fb177c 100644
--- a/taskcluster/gecko_taskgraph/optimize/schema.py
+++ b/taskcluster/gecko_taskgraph/optimize/schema.py
@@ -39,6 +39,8 @@ default_optimizations = (
     {"upload-symbols": None},
     # optimize strategy alias for reprocess-symbols tasks
     {"reprocess-symbols": None},
+    # optimization strategy for mozlint tests
+    {"skip-unless-mozlint": voluptuous.Any(str, [str])},
 )
 
 OptimizationSchema = voluptuous.Any(*default_optimizations)
diff --git a/taskcluster/gecko_taskgraph/optimize/strategies.py b/taskcluster/gecko_taskgraph/optimize/strategies.py
index ffc395385b..f1ade38672 100644
--- a/taskcluster/gecko_taskgraph/optimize/strategies.py
+++ b/taskcluster/gecko_taskgraph/optimize/strategies.py
@@ -11,6 +11,8 @@ from mozbuild.util import memoize
 from taskgraph.optimize.base import OptimizationStrategy, register_strategy
 from taskgraph.util.path import match as match_path
 
+from gecko_taskgraph.optimize.mozlint import SkipUnlessMozlint
+
 logger = logging.getLogger(__name__)
 
 
@@ -100,3 +102,6 @@ class SkipUnlessChanged(OptimizationStrategy):
             )
             return True
         return False
+
+
+register_strategy("skip-unless-mozlint", args=("tools/lint",))(SkipUnlessMozlint)
diff --git a/taskcluster/gecko_taskgraph/target_tasks.py b/taskcluster/gecko_taskgraph/target_tasks.py
index e004cfb3e2..5469f9eb0d 100644
--- a/taskcluster/gecko_taskgraph/target_tasks.py
+++ b/taskcluster/gecko_taskgraph/target_tasks.py
@@ -11,7 +11,7 @@ from datetime import datetime, timedelta
 
 from redo import retry
 from taskgraph.parameters import Parameters
-from taskgraph.target_tasks import _target_task, get_method
+from taskgraph.target_tasks import get_method, register_target_task
 from taskgraph.util.taskcluster import find_task_id
 
 from gecko_taskgraph import GECKO, try_option_syntax
@@ -43,7 +43,7 @@ UNCOMMON_TRY_TASK_LABELS = [
     r"linux-",  # hide all linux32 tasks by default - bug 1599197
     r"linux1804-32",  # hide linux32 tests - bug 1599197
     # Test tasks
-    r"web-platform-tests.*backlog",  # hide wpt jobs that are not implemented yet - bug 1572820
+    r"web-platform-tests(?!-webgpu).*backlog",  # hide wpt jobs that are not implemented yet - bug 1572820
     r"-ccov",
     r"-profiling-",  # talos/raptor profiling jobs are run too often
     r"-32-.*-webgpu",  # webgpu gets little benefit from these tests.
@@ -396,7 +396,7 @@ def _try_option_syntax(full_task_graph, parameters, graph_config):
     return target_tasks_labels
 
 
-@_target_task("try_tasks")
+@register_target_task("try_tasks")
 def target_tasks_try(full_task_graph, parameters, graph_config):
     try_mode = parameters["try_mode"]
     if try_mode == "try_task_config":
@@ -408,13 +408,13 @@ def target_tasks_try(full_task_graph, parameters, graph_config):
     return []
 
 
-@_target_task("try_select_tasks")
+@register_target_task("try_select_tasks")
 def target_tasks_try_select(full_task_graph, parameters, graph_config):
     tasks = target_tasks_try_select_uncommon(full_task_graph, parameters, graph_config)
     return [l for l in tasks if filter_by_uncommon_try_tasks(l)]
 
 
-@_target_task("try_select_tasks_uncommon")
+@register_target_task("try_select_tasks_uncommon")
 def target_tasks_try_select_uncommon(full_task_graph, parameters, graph_config):
     from gecko_taskgraph.decision import PER_PROJECT_PARAMETERS
 
@@ -440,7 +440,7 @@ def target_tasks_try_select_uncommon(full_task_graph, parameters, graph_config):
     return sorted(tasks)
 
 
-@_target_task("try_auto")
+@register_target_task("try_auto")
 def target_tasks_try_auto(full_task_graph, parameters, graph_config):
     """Target the tasks which have indicated they should be run on autoland
     (rather than try) via the `run_on_projects` attributes.
@@ -471,7 +471,7 @@ def target_tasks_try_auto(full_task_graph, parameters, graph_config):
     ]
 
 
-@_target_task("default")
+@register_target_task("default")
 def target_tasks_default(full_task_graph, parameters, graph_config):
     """Target the tasks which have indicated they should be run on this project
     via the `run_on_projects` attributes."""
@@ -484,7 +484,7 @@ def target_tasks_default(full_task_graph, parameters, graph_config):
     ]
 
 
-@_target_task("autoland_tasks")
+@register_target_task("autoland_tasks")
 def target_tasks_autoland(full_task_graph, parameters, graph_config):
     """In addition to doing the filtering by project that the 'default'
     filter does, also remove any tests running against shippable builds
@@ -510,7 +510,7 @@ def target_tasks_autoland(full_task_graph, parameters, graph_config):
     return [l for l in filtered_for_project if filter(full_task_graph[l])]
 
 
-@_target_task("mozilla_central_tasks")
+@register_target_task("mozilla_central_tasks")
 def target_tasks_mozilla_central(full_task_graph, parameters, graph_config):
     """In addition to doing the filtering by project that the 'default'
     filter does, also remove any tests running against regular (aka not shippable,
@@ -550,7 +550,7 @@ def target_tasks_mozilla_central(full_task_graph, parameters, graph_config):
     return [l for l in filtered_for_project if filter(full_task_graph[l])]
 
 
-@_target_task("graphics_tasks")
+@register_target_task("graphics_tasks")
 def target_tasks_graphics(full_task_graph, parameters, graph_config):
     """In addition to doing the filtering by project that the 'default'
     filter does, also remove artifact builds because we have csets on
@@ -568,7 +568,7 @@ def target_tasks_graphics(full_task_graph, parameters, graph_config):
     return [l for l in filtered_for_project if filter(full_task_graph[l])]
 
 
-@_target_task("mozilla_beta_tasks")
+@register_target_task("mozilla_beta_tasks")
 def target_tasks_mozilla_beta(full_task_graph, parameters, graph_config):
     """Select the set of tasks required for a promotable beta or release build
     of desktop, plus android CI. The candidates build process involves a pipeline
@@ -581,7 +581,7 @@ def target_tasks_mozilla_beta(full_task_graph, parameters, graph_config):
     ]
 
 
-@_target_task("mozilla_release_tasks")
+@register_target_task("mozilla_release_tasks")
 def target_tasks_mozilla_release(full_task_graph, parameters, graph_config):
     """Select the set of tasks required for a promotable beta or release build
     of desktop, plus android CI. The candidates build process involves a pipeline
@@ -594,7 +594,7 @@ def target_tasks_mozilla_release(full_task_graph, parameters, graph_config):
     ]
 
 
-@_target_task("mozilla_esr115_tasks")
+@register_target_task("mozilla_esr115_tasks")
 def target_tasks_mozilla_esr115(full_task_graph, parameters, graph_config):
     """Select the set of tasks required for a promotable beta or release build
     of desktop, without android CI. The candidates build process involves a pipeline
@@ -618,7 +618,7 @@ def target_tasks_mozilla_esr115(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("promote_desktop")
+@register_target_task("promote_desktop")
 def target_tasks_promote_desktop(full_task_graph, parameters, graph_config):
     """Select the superset of tasks required to promote a beta or release build
     of a desktop product. This should include all non-android
@@ -642,7 +642,7 @@ def target_tasks_promote_desktop(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("push_desktop")
+@register_target_task("push_desktop")
 def target_tasks_push_desktop(full_task_graph, parameters, graph_config):
     """Select the set of tasks required to push a build of desktop to cdns.
     Previous build deps will be optimized out via action task."""
@@ -668,7 +668,7 @@ def target_tasks_push_desktop(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("ship_desktop")
+@register_target_task("ship_desktop")
 def target_tasks_ship_desktop(full_task_graph, parameters, graph_config):
     """Select the set of tasks required to ship desktop.
     Previous build deps will be optimized out via action task."""
@@ -709,7 +709,7 @@ def target_tasks_ship_desktop(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("pine_tasks")
+@register_target_task("pine_tasks")
 def target_tasks_pine(full_task_graph, parameters, graph_config):
     """Bug 1879960 - no reftests or wpt needed"""
     filtered_for_project = target_tasks_default(
@@ -717,6 +717,8 @@ def target_tasks_pine(full_task_graph, parameters, graph_config):
     )
 
     def filter(task):
+        if "android" in task.attributes.get("build_platform", ""):
+            return False
         suite = task.attributes.get("unittest_suite", "")
         if "reftest" in suite or "web-platform" in suite:
             return False
@@ -725,7 +727,7 @@ def target_tasks_pine(full_task_graph, parameters, graph_config):
     return [l for l in filtered_for_project if filter(full_task_graph[l])]
 
 
-@_target_task("larch_tasks")
+@register_target_task("larch_tasks")
 def target_tasks_larch(full_task_graph, parameters, graph_config):
     """Bug 1879213 - only run necessary tasks on larch"""
     filtered_for_project = target_tasks_default(
@@ -749,7 +751,7 @@ def target_tasks_larch(full_task_graph, parameters, graph_config):
     return [l for l in filtered_for_project if filter(full_task_graph[l])]
 
 
-@_target_task("kaios_tasks")
+@register_target_task("kaios_tasks")
 def target_tasks_kaios(full_task_graph, parameters, graph_config):
     """The set of tasks to run for kaios integration"""
 
@@ -760,7 +762,7 @@ def target_tasks_kaios(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("custom-car_perf_testing")
+@register_target_task("custom-car_perf_testing")
 def target_tasks_custom_car_perf_testing(full_task_graph, parameters, graph_config):
     """Select tasks required for running daily performance tests for custom chromium-as-release."""
 
@@ -787,7 +789,7 @@ def target_tasks_custom_car_perf_testing(full_task_graph, parameters, graph_conf
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("general_perf_testing")
+@register_target_task("general_perf_testing")
 def target_tasks_general_perf_testing(full_task_graph, parameters, graph_config):
     """
     Select tasks required for running performance tests 3 times a week.
@@ -910,7 +912,7 @@ def make_desktop_nightly_filter(platforms):
     return filter
 
 
-@_target_task("sp-perftests")
+@register_target_task("sp-perftests")
 def target_tasks_speedometer_tests(full_task_graph, parameters, graph_config):
     def filter(task):
         platform = task.attributes.get("test_platform")
@@ -934,7 +936,7 @@ def target_tasks_speedometer_tests(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("nightly_linux")
+@register_target_task("nightly_linux")
 def target_tasks_nightly_linux(full_task_graph, parameters, graph_config):
     """Select the set of tasks required for a nightly build of linux. The
     nightly build process involves a pipeline of builds, signing,
@@ -945,7 +947,7 @@ def target_tasks_nightly_linux(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t, parameters)]
 
 
-@_target_task("nightly_macosx")
+@register_target_task("nightly_macosx")
 def target_tasks_nightly_macosx(full_task_graph, parameters, graph_config):
     """Select the set of tasks required for a nightly build of macosx. The
     nightly build process involves a pipeline of builds, signing,
@@ -954,7 +956,7 @@ def target_tasks_nightly_macosx(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t, parameters)]
 
 
-@_target_task("nightly_win32")
+@register_target_task("nightly_win32")
 def target_tasks_nightly_win32(full_task_graph, parameters, graph_config):
     """Select the set of tasks required for a nightly build of win32 and win64.
     The nightly build process involves a pipeline of builds, signing,
@@ -963,7 +965,7 @@ def target_tasks_nightly_win32(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t, parameters)]
 
 
-@_target_task("nightly_win64")
+@register_target_task("nightly_win64")
 def target_tasks_nightly_win64(full_task_graph, parameters, graph_config):
     """Select the set of tasks required for a nightly build of win32 and win64.
     The nightly build process involves a pipeline of builds, signing,
@@ -972,7 +974,7 @@ def target_tasks_nightly_win64(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t, parameters)]
 
 
-@_target_task("nightly_win64_aarch64")
+@register_target_task("nightly_win64_aarch64")
 def target_tasks_nightly_win64_aarch64(full_task_graph, parameters, graph_config):
     """Select the set of tasks required for a nightly build of win32 and win64.
     The nightly build process involves a pipeline of builds, signing,
@@ -981,7 +983,7 @@ def target_tasks_nightly_win64_aarch64(full_task_graph, parameters, graph_config
     return [l for l, t in full_task_graph.tasks.items() if filter(t, parameters)]
 
 
-@_target_task("nightly_asan")
+@register_target_task("nightly_asan")
 def target_tasks_nightly_asan(full_task_graph, parameters, graph_config):
     """Select the set of tasks required for a nightly build of asan. The
     nightly build process involves a pipeline of builds, signing,
@@ -992,7 +994,7 @@ def target_tasks_nightly_asan(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t, parameters)]
 
 
-@_target_task("daily_releases")
+@register_target_task("daily_releases")
 def target_tasks_daily_releases(full_task_graph, parameters, graph_config):
     """Select the set of tasks required to identify if we should release.
     If we determine that we should the task will communicate to ship-it to
@@ -1004,7 +1006,7 @@ def target_tasks_daily_releases(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("nightly_desktop")
+@register_target_task("nightly_desktop")
 def target_tasks_nightly_desktop(full_task_graph, parameters, graph_config):
     """Select the set of tasks required for a nightly build of linux, mac,
     windows."""
@@ -1042,7 +1044,7 @@ def target_tasks_nightly_desktop(full_task_graph, parameters, graph_config):
     )
 
 
-@_target_task("nightly_all")
+@register_target_task("nightly_all")
 def target_tasks_nightly_all(full_task_graph, parameters, graph_config):
     """Select the set of tasks required for a nightly build of firefox desktop and android"""
     index_path = (
@@ -1065,7 +1067,7 @@ def target_tasks_nightly_all(full_task_graph, parameters, graph_config):
 
 
 # Run Searchfox analysis once daily.
-@_target_task("searchfox_index")
+@register_target_task("searchfox_index")
 def target_tasks_searchfox(full_task_graph, parameters, graph_config):
     """Select tasks required for indexing Firefox for Searchfox web site each day"""
     return [
@@ -1081,7 +1083,7 @@ def target_tasks_searchfox(full_task_graph, parameters, graph_config):
 
 
 # Run build linux64-plain-clang-trunk/opt on mozilla-central/beta with perf tests
-@_target_task("linux64_clang_trunk_perf")
+@register_target_task("linux64_clang_trunk_perf")
 def target_tasks_build_linux64_clang_trunk_perf(
     full_task_graph, parameters, graph_config
 ):
@@ -1097,19 +1099,19 @@ def target_tasks_build_linux64_clang_trunk_perf(
 
 
 # Run Updatebot's cron job 4 times daily.
-@_target_task("updatebot_cron")
+@register_target_task("updatebot_cron")
 def target_tasks_updatebot_cron(full_task_graph, parameters, graph_config):
     """Select tasks required to run Updatebot's cron job"""
     return ["updatebot-cron"]
 
 
-@_target_task("customv8_update")
+@register_target_task("customv8_update")
 def target_tasks_customv8_update(full_task_graph, parameters, graph_config):
     """Select tasks required for building latest d8/v8 version."""
     return ["toolchain-linux64-custom-v8"]
 
 
-@_target_task("file_update")
+@register_target_task("file_update")
 def target_tasks_file_update(full_task_graph, parameters, graph_config):
     """Select the set of tasks required to perform nightly in-tree file updates"""
 
@@ -1120,7 +1122,7 @@ def target_tasks_file_update(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("l10n_bump")
+@register_target_task("l10n_bump")
 def target_tasks_l10n_bump(full_task_graph, parameters, graph_config):
     """Select the set of tasks required to perform l10n bumping."""
 
@@ -1131,7 +1133,7 @@ def target_tasks_l10n_bump(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("merge_automation")
+@register_target_task("merge_automation")
 def target_tasks_merge_automation(full_task_graph, parameters, graph_config):
     """Select the set of tasks required to perform repository merges."""
 
@@ -1142,7 +1144,7 @@ def target_tasks_merge_automation(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("scriptworker_canary")
+@register_target_task("scriptworker_canary")
 def target_tasks_scriptworker_canary(full_task_graph, parameters, graph_config):
     """Select the set of tasks required to run scriptworker canaries."""
 
@@ -1153,7 +1155,7 @@ def target_tasks_scriptworker_canary(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("cron_bouncer_check")
+@register_target_task("cron_bouncer_check")
 def target_tasks_bouncer_check(full_task_graph, parameters, graph_config):
     """Select the set of tasks required to perform bouncer version verification."""
 
@@ -1166,7 +1168,7 @@ def target_tasks_bouncer_check(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("staging_release_builds")
+@register_target_task("staging_release_builds")
 def target_tasks_staging_release(full_task_graph, parameters, graph_config):
     """
     Select all builds that are part of releases.
@@ -1190,7 +1192,7 @@ def target_tasks_staging_release(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("release_simulation")
+@register_target_task("release_simulation")
 def target_tasks_release_simulation(full_task_graph, parameters, graph_config):
     """
     Select builds that would run on push on a release branch.
@@ -1227,7 +1229,7 @@ def target_tasks_release_simulation(full_task_graph, parameters, graph_config):
     ]
 
 
-@_target_task("codereview")
+@register_target_task("codereview")
 def target_tasks_codereview(full_task_graph, parameters, graph_config):
     """Select all code review tasks needed to produce a report"""
 
@@ -1245,13 +1247,13 @@ def target_tasks_codereview(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("nothing")
+@register_target_task("nothing")
 def target_tasks_nothing(full_task_graph, parameters, graph_config):
     """Select nothing, for DONTBUILD pushes"""
     return []
 
 
-@_target_task("daily_beta_perf")
+@register_target_task("daily_beta_perf")
 def target_tasks_daily_beta_perf(full_task_graph, parameters, graph_config):
     """
     Select performance tests on the beta branch to be run daily
@@ -1353,7 +1355,7 @@ def target_tasks_daily_beta_perf(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("weekly_release_perf")
+@register_target_task("weekly_release_perf")
 def target_tasks_weekly_release_perf(full_task_graph, parameters, graph_config):
     """
     Select performance tests on the release branch to be run weekly
@@ -1421,7 +1423,7 @@ def target_tasks_weekly_release_perf(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("raptor_tp6m")
+@register_target_task("raptor_tp6m")
 def target_tasks_raptor_tp6m(full_task_graph, parameters, graph_config):
     """
     Select tasks required for running raptor cold page-load tests on fenix and refbrow
@@ -1448,7 +1450,7 @@ def target_tasks_raptor_tp6m(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("backfill_all_browsertime")
+@register_target_task("backfill_all_browsertime")
 def target_tasks_backfill_all_browsertime(full_task_graph, parameters, graph_config):
     """
     Search for revisions that contains patches that were reviewed by perftest reviewers
@@ -1516,7 +1518,7 @@ def target_tasks_backfill_all_browsertime(full_task_graph, parameters, graph_con
     return []
 
 
-@_target_task("condprof")
+@register_target_task("condprof")
 def target_tasks_condprof(full_task_graph, parameters, graph_config):
     """
     Select tasks required for building conditioned profiles.
@@ -1527,7 +1529,7 @@ def target_tasks_condprof(full_task_graph, parameters, graph_config):
                 yield name
 
 
-@_target_task("system_symbols")
+@register_target_task("system_symbols")
 def target_tasks_system_symbols(full_task_graph, parameters, graph_config):
     """
     Select tasks for scraping and uploading system symbols.
@@ -1541,7 +1543,7 @@ def target_tasks_system_symbols(full_task_graph, parameters, graph_config):
             yield name
 
 
-@_target_task("perftest")
+@register_target_task("perftest")
 def target_tasks_perftest(full_task_graph, parameters, graph_config):
     """
     Select perftest tasks we want to run daily
@@ -1553,7 +1555,7 @@ def target_tasks_perftest(full_task_graph, parameters, graph_config):
             yield name
 
 
-@_target_task("perftest-on-autoland")
+@register_target_task("perftest-on-autoland")
 def target_tasks_perftest_autoland(full_task_graph, parameters, graph_config):
     """
     Select perftest tasks we want to run daily
@@ -1567,7 +1569,7 @@ def target_tasks_perftest_autoland(full_task_graph, parameters, graph_config):
             yield name
 
 
-@_target_task("l10n-cross-channel")
+@register_target_task("l10n-cross-channel")
 def target_tasks_l10n_cross_channel(full_task_graph, parameters, graph_config):
     """Select the set of tasks required to run l10n cross-channel."""
 
@@ -1577,7 +1579,7 @@ def target_tasks_l10n_cross_channel(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("eslint-build")
+@register_target_task("eslint-build")
 def target_tasks_eslint_build(full_task_graph, parameters, graph_config):
     """Select the task to run additional ESLint rules which require a build."""
 
@@ -1588,7 +1590,7 @@ def target_tasks_eslint_build(full_task_graph, parameters, graph_config):
             yield name
 
 
-@_target_task("holly_tasks")
+@register_target_task("holly_tasks")
 def target_tasks_holly(full_task_graph, parameters, graph_config):
     """Bug 1814661: only run updatebot tasks on holly"""
 
@@ -1598,7 +1600,7 @@ def target_tasks_holly(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
-@_target_task("snap_upstream_tests")
+@register_target_task("snap_upstream_tests")
 def target_tasks_snap_upstream_tests(full_task_graph, parameters, graph_config):
     """
     Select tasks for testing Snap package built as upstream. Omit -try because
@@ -1609,7 +1611,7 @@ def target_tasks_snap_upstream_tests(full_task_graph, parameters, graph_config):
             yield name
 
 
-@_target_task("nightly-android")
+@register_target_task("nightly-android")
 def target_tasks_nightly_android(full_task_graph, parameters, graph_config):
     def filter(task, parameters):
         # geckoview
@@ -1645,11 +1647,11 @@ def target_tasks_nightly_android(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t, parameters)]
 
 
-@_target_task("android-l10n-import")
+@register_target_task("android-l10n-import")
 def target_tasks_android_l10n_import(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if l == "android-l10n-import"]
 
 
-@_target_task("android-l10n-sync")
+@register_target_task("android-l10n-sync")
 def target_tasks_android_l10n_sync(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if l == "android-l10n-sync"]
diff --git a/taskcluster/gecko_taskgraph/test/automationrelevance.json b/taskcluster/gecko_taskgraph/test/automationrelevance.json
deleted file mode 100644
index 3bdfa9ed9e..0000000000
--- a/taskcluster/gecko_taskgraph/test/automationrelevance.json
+++ /dev/null
@@ -1,358 +0,0 @@
-{
-  "changesets": [
-    {
-      "author": "James Long <longster@gmail.com>",
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-      "bugs": [
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-          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1300866"
-        }
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-      "desc": "Bug 1300866 - expose devtools require to new debugger r=jlast,bgrins",
-      "extra": {
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-      },
-      "files": ["devtools/client/debugger/index.html"],
-      "node": "ae2144aa4356b65c2f8c0de8c9082dcb7e330e24",
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-        "99c542fa43a72ee863c813b5624048d1b443549b",
-        "a6b6a93eb41a05e310a11f0172f01ba9b21d3eac",
-        "541c9086c0f27fba60beecc9bc94543103895c86",
-        "041a925171e431bf51fb50193ab19d156088c89a",
-        "a14f88a9af7a59e677478694bafd9375ac53683e"
-      ],
-      "pushuser": "cbook@mozilla.com",
-      "rev": 312890,
-      "reviewers": [
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-          "revset": "reviewer(jlast)"
-        },
-        {
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-          "revset": "reviewer(bgrins)"
-        }
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-      "treeherderrepo": "mozilla-central",
-      "treeherderrepourl": "https://treeherder.mozilla.org/#/jobs?repo=mozilla-central"
-    },
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-      "backsoutnodes": [],
-      "bugs": [],
-      "date": [1473208638.0, 25200],
-      "desc": "Merge m-c to fx-team, a=merge",
-      "extra": {
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-      },
-      "files": ["taskcluster/scripts/builder/build-l10n.sh"],
-      "node": "73a6a267a50a0e1c41e689b265ad3eebe43d7ac6",
-      "parents": [
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-      "perfherderurl": "https://treeherder.mozilla.org/perf.html#/compare?originalProject=mozilla-central&originalRevision=a14f88a9af7a59e677478694bafd9375ac53683e&newProject=mozilla-central&newRevision=ae2144aa4356b65c2f8c0de8c9082dcb7e330e24",
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-        "a6b6a93eb41a05e310a11f0172f01ba9b21d3eac",
-        "541c9086c0f27fba60beecc9bc94543103895c86",
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-      "treeherderrepourl": "https://treeherder.mozilla.org/#/jobs?repo=mozilla-central"
-    },
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-          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1296648"
-        }
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-      "date": [1472957580.0, 14400],
-      "desc": "Bug 1296648 - Fix direction of .ruleview-expander.theme-twisty in RTL locales. r=ntim",
-      "extra": {
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-      "files": ["devtools/client/themes/rules.css"],
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-          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1300336"
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-      "extra": {
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-      "backsoutnodes": [],
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-      "date": [1472629906.0, -7200],
-      "desc": "Bug 1299154 - added Set/GetOverrideDPPX to restorefromHistory; r=mstange\n\nMozReview-Commit-ID: AsyAcG3Igbn\n",
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-        "committer": "Matteo Ferretti <mferretti@mozilla.com> 1473236511 -7200"
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-      "backsoutnodes": [],
-      "bugs": [],
-      "date": [1473261233.0, -7200],
-      "desc": "merge fx-team to mozilla-central a=merge",
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-        "16a1a91f9269ab95dd83eb29dc5d0227665f7d94",
-        "99c542fa43a72ee863c813b5624048d1b443549b",
-        "a6b6a93eb41a05e310a11f0172f01ba9b21d3eac",
-        "541c9086c0f27fba60beecc9bc94543103895c86",
-        "041a925171e431bf51fb50193ab19d156088c89a",
-        "a14f88a9af7a59e677478694bafd9375ac53683e"
-      ],
-      "pushuser": "cbook@mozilla.com",
-      "rev": 312897,
-      "reviewers": [
-        {
-          "name": "merge",
-          "revset": "reviewer(merge)"
-        }
-      ],
-      "treeherderrepo": "mozilla-central",
-      "treeherderrepourl": "https://treeherder.mozilla.org/#/jobs?repo=mozilla-central"
-    }
-  ],
-  "visible": true
-}
diff --git a/taskcluster/gecko_taskgraph/test/conftest.py b/taskcluster/gecko_taskgraph/test/conftest.py
index ff3d6ce2bd..758d3402b5 100644
--- a/taskcluster/gecko_taskgraph/test/conftest.py
+++ b/taskcluster/gecko_taskgraph/test/conftest.py
@@ -47,7 +47,7 @@ def enable_logging():
 
 @pytest.fixture(scope="session")
 def graph_config():
-    return load_graph_config(os.path.join(GECKO, "taskcluster", "ci"))
+    return load_graph_config(os.path.join(GECKO, "taskcluster"))
 
 
 @pytest.fixture(scope="session")
diff --git a/taskcluster/gecko_taskgraph/test/test_actions_util.py b/taskcluster/gecko_taskgraph/test/test_actions_util.py
index 7c38caea57..0838dafc11 100644
--- a/taskcluster/gecko_taskgraph/test/test_actions_util.py
+++ b/taskcluster/gecko_taskgraph/test/test_actions_util.py
@@ -155,6 +155,7 @@ def is_subset(subset, superset):
 def test_extract_applicable_action(
     responses, monkeypatch, actions_json, task_def, expected
 ):
+    actions.util.get_task_definition.cache_clear()
     base_url = "https://taskcluster"
     decision_task_id = "dddd"
     task_id = "tttt"
diff --git a/taskcluster/gecko_taskgraph/test/test_files_changed.py b/taskcluster/gecko_taskgraph/test/test_files_changed.py
index 5b9a016649..389dbb4093 100644
--- a/taskcluster/gecko_taskgraph/test/test_files_changed.py
+++ b/taskcluster/gecko_taskgraph/test/test_files_changed.py
@@ -3,14 +3,11 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 
-import json
-import os
 import unittest
 
 from mozunit import main
 
 from gecko_taskgraph import files_changed
-from gecko_taskgraph.util import hg
 
 PARAMS = {
     "head_repository": "https://hg.mozilla.org/mozilla-central",
@@ -31,40 +28,17 @@ FILES_CHANGED = [
 ]
 
 
-class FakeResponse:
-    def json(self):
-        with open(
-            os.path.join(os.path.dirname(__file__), "automationrelevance.json")
-        ) as f:
-            return json.load(f)
-
-
-class TestGetChangedFiles(unittest.TestCase):
-    def setUp(self):
-        files_changed.get_changed_files.clear()
-        self.old_get = hg.requests.get
-
-        def fake_get(url, **kwargs):
-            return FakeResponse()
-
-        hg.requests.get = fake_get
-
-    def tearDown(self):
-        hg.requests.get = self.old_get
-        files_changed.get_changed_files.clear()
-
-    def test_get_changed_files(self):
-        """Get_changed_files correctly gets the list of changed files in a push.
-        This tests against the production hg.mozilla.org so that it will detect
-        any changes in the format of the returned data."""
-        self.assertEqual(
-            sorted(
-                files_changed.get_changed_files(
-                    PARAMS["head_repository"], PARAMS["head_rev"]
-                )
-            ),
-            FILES_CHANGED,
+def test_get_changed_files(responses):
+    url = f"{PARAMS['head_repository']}/json-pushchangedfiles/{PARAMS['head_rev']}"
+    responses.add(responses.GET, url, status=200, json={"files": FILES_CHANGED})
+    assert (
+        sorted(
+            files_changed.get_changed_files(
+                PARAMS["head_repository"], PARAMS["head_rev"]
+            )
         )
+        == FILES_CHANGED
+    )
 
 
 class TestCheck(unittest.TestCase):
diff --git a/taskcluster/gecko_taskgraph/test/test_optimize_strategies.py b/taskcluster/gecko_taskgraph/test/test_optimize_strategies.py
index 1240d71cf8..2c10ba449a 100644
--- a/taskcluster/gecko_taskgraph/test/test_optimize_strategies.py
+++ b/taskcluster/gecko_taskgraph/test/test_optimize_strategies.py
@@ -19,6 +19,7 @@ from gecko_taskgraph.optimize.bugbug import (
     DisperseGroups,
     SkipUnlessDebug,
 )
+from gecko_taskgraph.optimize.mozlint import SkipUnlessMozlint
 from gecko_taskgraph.optimize.strategies import SkipUnlessSchedules
 from gecko_taskgraph.util.backstop import BACKSTOP_PUSH_INTERVAL
 from gecko_taskgraph.util.bugbug import (
@@ -511,5 +512,79 @@ def test_project_autoland_test(monkeypatch, responses, params):
     assert scheduled == {"task-0-label", "task-1-label"}
 
 
+@pytest.mark.parametrize(
+    "pushed_files,to_lint,expected",
+    [
+        pytest.param(
+            ["a/b/c.txt"],
+            [],
+            True,
+        ),
+        pytest.param(
+            ["python/mozlint/a/support_file.txt", "b/c/d.txt"],
+            ["python/mozlint/a/support_file.txt"],
+            False,
+        ),
+    ],
+    ids=idfn,
+)
+def test_mozlint_should_remove_task(
+    monkeypatch, params, pushed_files, to_lint, expected
+):
+    import mozlint.pathutils
+
+    class MockParser:
+        def __call__(self, *args, **kwargs):
+            return []
+
+    def mock_filterpaths(*args, **kwargs):
+        return to_lint, None
+
+    monkeypatch.setattr(mozlint.pathutils, "filterpaths", mock_filterpaths)
+
+    opt = SkipUnlessMozlint("")
+    monkeypatch.setattr(opt, "mozlint_parser", MockParser())
+    params["files_changed"] = pushed_files
+
+    result = opt.should_remove_task(default_tasks[0], params, "")
+    assert result == expected
+
+
+@pytest.mark.parametrize(
+    "pushed_files,linter_config,expected",
+    [
+        pytest.param(
+            ["a/b/c.txt"],
+            [{"include": ["b/c"]}],
+            True,
+        ),
+        pytest.param(
+            ["a/b/c.txt"],
+            [{"include": ["a/b"], "exclude": ["a/b/c.txt"]}],
+            True,
+        ),
+        pytest.param(
+            ["python/mozlint/a/support_file.txt", "b/c/d.txt"],
+            [{}],
+            False,
+        ),
+    ],
+    ids=idfn,
+)
+def test_mozlint_should_remove_task2(
+    monkeypatch, params, pushed_files, linter_config, expected
+):
+    class MockParser:
+        def __call__(self, *args, **kwargs):
+            return linter_config
+
+    opt = SkipUnlessMozlint("")
+    monkeypatch.setattr(opt, "mozlint_parser", MockParser())
+    params["files_changed"] = pushed_files
+
+    result = opt.should_remove_task(default_tasks[0], params, "")
+    assert result == expected
+
+
 if __name__ == "__main__":
     main()
diff --git a/taskcluster/gecko_taskgraph/test/test_transforms_job.py b/taskcluster/gecko_taskgraph/test/test_transforms_job.py
index b032307ea6..6161a36054 100644
--- a/taskcluster/gecko_taskgraph/test/test_transforms_job.py
+++ b/taskcluster/gecko_taskgraph/test/test_transforms_job.py
@@ -37,7 +37,7 @@ TASK_DEFAULTS = {
 
 @pytest.fixture(scope="module")
 def config():
-    graph_config = load_graph_config(os.path.join(GECKO, "taskcluster", "ci"))
+    graph_config = load_graph_config(os.path.join(GECKO, "taskcluster"))
     params = FakeParameters(
         {
             "base_repository": "http://hg.example.com",
diff --git a/taskcluster/gecko_taskgraph/transforms/bouncer_submission.py b/taskcluster/gecko_taskgraph/transforms/bouncer_submission.py
index fb5b17d3b3..1434b4013a 100644
--- a/taskcluster/gecko_taskgraph/transforms/bouncer_submission.py
+++ b/taskcluster/gecko_taskgraph/transforms/bouncer_submission.py
@@ -101,6 +101,7 @@ CONFIG_PER_BOUNCER_PRODUCT = {
         "file_names": {
             "win": "{pretty_product}%20Setup%20{version}.msix",
             "win64": "{pretty_product}%20Setup%20{version}.msix",
+            "win64-aarch64": "{pretty_product}%20Setup%20{version}.msix",
         },
     },
     "pkg": {
diff --git a/taskcluster/gecko_taskgraph/transforms/build.py b/taskcluster/gecko_taskgraph/transforms/build.py
index 4e73c5aef2..3ab22f2923 100644
--- a/taskcluster/gecko_taskgraph/transforms/build.py
+++ b/taskcluster/gecko_taskgraph/transforms/build.py
@@ -139,6 +139,10 @@ def use_artifact(config, jobs):
             and job.get("index", {}).get("job-name") in ARTIFACT_JOBS
             # If tests aren't packaged, then we are not able to rebuild all the packages
             and job["worker"]["env"].get("MOZ_AUTOMATION_PACKAGE_TESTS") == "1"
+            # Android shippable artifact builds are not supported
+            and not (
+                "android" in job["name"] and job["attributes"].get("shippable", False)
+            )
         ):
             job["treeherder"]["symbol"] = add_suffix(job["treeherder"]["symbol"], "a")
             job["worker"]["env"]["USE_ARTIFACT"] = "1"
diff --git a/taskcluster/gecko_taskgraph/transforms/build_schedules.py b/taskcluster/gecko_taskgraph/transforms/build_schedules.py
index ed6262b8b2..f9621adf77 100644
--- a/taskcluster/gecko_taskgraph/transforms/build_schedules.py
+++ b/taskcluster/gecko_taskgraph/transforms/build_schedules.py
@@ -19,15 +19,7 @@ def set_build_schedules_optimization(config, tasks):
             continue
 
         schedules = []
-        if config.kind == "build":
-            family = platform_family(task["attributes"]["build_platform"])
-            schedules = [family]
-
-            if "android" not in family:
-                # These are not GeckoView builds, so are associated with Firefox.
-                schedules.append("firefox")
-
-        elif config.kind in (
+        if config.kind in (
             "build-components",
             "build-samples-browser",
             "test-components",
@@ -44,5 +36,13 @@ def set_build_schedules_optimization(config, tasks):
             elif "focus" in task["name"] or "klar" in task["name"]:
                 schedules.append("focus-android")
 
+        else:
+            family = platform_family(task["attributes"]["build_platform"])
+            schedules = [family]
+
+            if "android" not in family:
+                # These are not GeckoView builds, so are associated with Firefox.
+                schedules.append("firefox")
+
         task["optimization"] = {"build": schedules}
         yield task
diff --git a/taskcluster/gecko_taskgraph/transforms/diffoscope.py b/taskcluster/gecko_taskgraph/transforms/diffoscope.py
index b74dc5bb8f..05c6617950 100644
--- a/taskcluster/gecko_taskgraph/transforms/diffoscope.py
+++ b/taskcluster/gecko_taskgraph/transforms/diffoscope.py
@@ -32,7 +32,7 @@ diff_description_schema = Schema(
         Required("original"): index_or_string,
         Required("new"): index_or_string,
         # Arguments to pass to diffoscope, used for job-defaults in
-        # taskcluster/ci/diffoscope/kind.yml
+        # taskcluster/kinds/diffoscope/kind.yml
         Optional("args"): str,
         # Extra arguments to pass to diffoscope, that can be set per job.
         Optional("extra-args"): str,
diff --git a/taskcluster/gecko_taskgraph/transforms/github_sync.py b/taskcluster/gecko_taskgraph/transforms/github_sync.py
deleted file mode 100644
index 6f48f794ce..0000000000
--- a/taskcluster/gecko_taskgraph/transforms/github_sync.py
+++ /dev/null
@@ -1,23 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-from taskgraph.transforms.base import TransformSequence
-
-transforms = TransformSequence()
-
-
-@transforms.add
-def sync_github(config, tasks):
-    """Do transforms specific to github-sync tasks."""
-    for task in tasks:
-        # Add the secret to the scopes, only in m-c.
-        # Doing this on any other tree will result in decision task failure
-        # because m-c is the only one allowed to have that scope.
-        secret = task["secret"]
-        if config.params["project"] == "mozilla-central":
-            task.setdefault("scopes", [])
-            task["scopes"].append("secrets:get:" + secret)
-            task["worker"].setdefault("env", {})["GITHUB_SECRET"] = secret
-        del task["secret"]
-        yield task
diff --git a/taskcluster/gecko_taskgraph/transforms/perftest.py b/taskcluster/gecko_taskgraph/transforms/perftest.py
index 47baafdad7..066db956f7 100644
--- a/taskcluster/gecko_taskgraph/transforms/perftest.py
+++ b/taskcluster/gecko_taskgraph/transforms/perftest.py
@@ -1,3 +1,4 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 """
diff --git a/taskcluster/gecko_taskgraph/transforms/reprocess_symbols.py b/taskcluster/gecko_taskgraph/transforms/reprocess_symbols.py
index ea2cac3a68..48465b3ab7 100644
--- a/taskcluster/gecko_taskgraph/transforms/reprocess_symbols.py
+++ b/taskcluster/gecko_taskgraph/transforms/reprocess_symbols.py
@@ -3,7 +3,7 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 """
 Transform the reprocess-symbols task description template,
-taskcluster/ci/reprocess-symbols/job-template.yml into an actual task description.
+taskcluster/kinds/reprocess-symbols/job-template.yml into an actual task description.
 """
 
 
diff --git a/taskcluster/gecko_taskgraph/transforms/signing.py b/taskcluster/gecko_taskgraph/transforms/signing.py
index 1bf91effd1..760f9f122f 100644
--- a/taskcluster/gecko_taskgraph/transforms/signing.py
+++ b/taskcluster/gecko_taskgraph/transforms/signing.py
@@ -61,6 +61,14 @@ signing_description_schema = Schema(
 )
 
 
+def get_locales_description(attributes, default):
+    """Returns the [list] of locales for task description usage"""
+    chunk_locales = attributes.get("chunk_locales")
+    if chunk_locales:
+        return ", ".join(chunk_locales)
+    return attributes.get("locale", default)
+
+
 @transforms.add
 def delete_name(config, jobs):
     """Delete the 'name' key if it exists, we don't use it."""
@@ -77,6 +85,7 @@ transforms.add_validate(signing_description_schema)
 def add_requirements_link(config, jobs):
     for job in jobs:
         dep_job = get_primary_dependency(config, job)
+        assert dep_job
         requirements_path = evaluate_keyed_by(
             config.graph_config["mac-signing"]["mac-requirements"],
             "mac requirements",
@@ -95,6 +104,7 @@ def add_requirements_link(config, jobs):
 def make_task_description(config, jobs):
     for job in jobs:
         dep_job = get_primary_dependency(config, job)
+        assert dep_job
         attributes = dep_job.attributes
 
         signing_format_scopes = []
@@ -105,6 +115,7 @@ def make_task_description(config, jobs):
 
         is_shippable = dep_job.attributes.get("shippable", False)
         build_platform = dep_job.attributes.get("build_platform")
+        assert build_platform
         treeherder = None
         if "partner" not in config.kind and "eme-free" not in config.kind:
             treeherder = job.get("treeherder", {})
@@ -139,9 +150,9 @@ def make_task_description(config, jobs):
 
         label = job["label"]
         description = (
-            "Initial Signing for locale '{locale}' for build '"
+            "Signing of locale(s) '{locale}' for build '"
             "{build_platform}/{build_type}'".format(
-                locale=attributes.get("locale", "en-US"),
+                locale=get_locales_description(attributes, "en-US"),
                 build_platform=build_platform,
                 build_type=attributes.get("build_type"),
             )
@@ -187,10 +198,16 @@ def make_task_description(config, jobs):
 
         # build-mac-{signing,notarization} uses signingscript instead of iscript
         if "macosx" in build_platform and config.kind.endswith("-mac-notarization"):
-            task["worker"]["mac-behavior"] = "apple_notarization"
             task["scopes"] = [
                 add_scope_prefix(config, "signing:cert:release-apple-notarization")
             ]
+            task[
+                "description"
+            ] = "Notarization of '{}' locales for build '{}/{}'".format(
+                get_locales_description(attributes, "en-US"),
+                build_platform,
+                attributes.get("build_type"),
+            )
         elif "macosx" in build_platform:
             # iscript overrides
             task["worker"]["mac-behavior"] = "mac_sign_and_pkg"
diff --git a/taskcluster/gecko_taskgraph/transforms/source_checksums_signing.py b/taskcluster/gecko_taskgraph/transforms/source_checksums_signing.py
index 0c31f48cc0..2b846604f1 100644
--- a/taskcluster/gecko_taskgraph/transforms/source_checksums_signing.py
+++ b/taskcluster/gecko_taskgraph/transforms/source_checksums_signing.py
@@ -1,3 +1,4 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 """
diff --git a/taskcluster/gecko_taskgraph/transforms/source_test.py b/taskcluster/gecko_taskgraph/transforms/source_test.py
index e3eeb7c819..266637a7a0 100644
--- a/taskcluster/gecko_taskgraph/transforms/source_test.py
+++ b/taskcluster/gecko_taskgraph/transforms/source_test.py
@@ -1,3 +1,4 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 """
@@ -264,8 +265,8 @@ def remove_optimization_on_central(config, jobs):
         if not job.get("attributes", {}).get("code-review", False):
             yield job
             continue
-        if "when" not in job:
-            yield job
-            continue
-        del job["when"]
+        if "when" in job:
+            del job["when"]
+        if "optimization" in job and "skip-unless-mozlint" in job["optimization"]:
+            del job["optimization"]
         yield job
diff --git a/taskcluster/gecko_taskgraph/transforms/task.py b/taskcluster/gecko_taskgraph/transforms/task.py
index 4bfe0e9f6d..aa77c46d65 100644
--- a/taskcluster/gecko_taskgraph/transforms/task.py
+++ b/taskcluster/gecko_taskgraph/transforms/task.py
@@ -208,7 +208,7 @@ TC_TREEHERDER_SCHEMA_URL = (
 
 
 UNKNOWN_GROUP_NAME = (
-    "Treeherder group {} (from {}) has no name; " "add it to taskcluster/ci/config.yml"
+    "Treeherder group {} (from {}) has no name; " "add it to taskcluster/config.yml"
 )
 
 V2_ROUTE_TEMPLATES = [
@@ -313,7 +313,7 @@ def index_builder(name):
 
 UNSUPPORTED_INDEX_PRODUCT_ERROR = """\
 The gecko-v2 product {product} is not in the list of configured products in
-`taskcluster/ci/config.yml'.
+`taskcluster/config.yml'.
 """
 
 
@@ -842,6 +842,7 @@ def build_generic_worker_payload(config, task, task_def):
         # behavior for mac iscript
         Optional("mac-behavior"): Any(
             "apple_notarization",
+            "apple_notarization_stacked",
             "mac_sign_and_pkg",
             "mac_sign_and_pkg_hardened",
             "mac_geckodriver",
@@ -1612,7 +1613,7 @@ def task_name_from_label(config, tasks):
 
 UNSUPPORTED_SHIPPING_PRODUCT_ERROR = """\
 The shipping product {product} is not in the list of configured products in
-`taskcluster/ci/config.yml'.
+`taskcluster/config.yml'.
 """
 
 
diff --git a/taskcluster/gecko_taskgraph/transforms/test/other.py b/taskcluster/gecko_taskgraph/transforms/test/other.py
index 5d54467001..e01691c05a 100644
--- a/taskcluster/gecko_taskgraph/transforms/test/other.py
+++ b/taskcluster/gecko_taskgraph/transforms/test/other.py
@@ -419,26 +419,20 @@ def setup_browsertime(config, tasks):
                 "win32-chromedriver-122",
                 "win32-chromedriver-123",
             ],
-            "windows.*-32.*": [
-                "win32-chromedriver-122",
-                "win32-chromedriver-123",
-                "win32-chromedriver-124",
-            ],
             "windows.*-64.*": [
-                "win32-chromedriver-122",
-                "win32-chromedriver-123",
+                "win64-chromedriver-123",
                 "win64-chromedriver-124",
             ],
         }
 
         chromium_fetches = {
-            "linux.*": ["linux64-chromium"],
-            "macosx1015.*": ["mac-chromium"],
-            "macosx1400.*": ["mac-chromium-arm"],
-            "windows.*aarch64.*": ["win32-chromium"],
-            "windows.*-32.*": ["win32-chromium"],
-            "windows.*-64.*": ["win64-chromium"],
-            "android.*": ["linux64-chromium"],
+            "linux.*": ["linux64-chromiumdriver"],
+            "macosx1015.*": ["mac-chromiumdriver"],
+            "macosx1400.*": ["mac-chromiumdriver-arm"],
+            "windows.*aarch64.*": ["win32-chromiumdriver"],
+            "windows.*-32.*": ["win32-chromiumdriver"],
+            "windows.*-64.*": ["win64-chromiumdriver"],
+            "android.*": ["linux64-chromiumdriver"],
         }
 
         cd_extracted_name = {
@@ -581,7 +575,9 @@ def enable_code_coverage(config, tasks):
                 yield task
                 continue
             task["mozharness"].setdefault("extra-options", []).append("--code-coverage")
-            task["instance-size"] = "xlarge"
+            task["instance-size"] = "xlarge-noscratch"
+            if "jittest" in task["test-name"]:
+                task["instance-size"] = "xlarge"
 
             # Temporarily disable Mac tests on mozilla-central
             if "mac" in task["build-platform"]:
diff --git a/taskcluster/gecko_taskgraph/transforms/test/variant.py b/taskcluster/gecko_taskgraph/transforms/test/variant.py
index bda91b2f25..6ee6c429f0 100644
--- a/taskcluster/gecko_taskgraph/transforms/test/variant.py
+++ b/taskcluster/gecko_taskgraph/transforms/test/variant.py
@@ -78,6 +78,14 @@ def split_variants(config, tasks):
             remaining_variants.append(name)
         return remaining_variants
 
+    def replace_task_items(task_key, variant_key):
+        for item in variant_key:
+            if isinstance(variant_key[item], dict):
+                task_key[item] = replace_task_items(task_key[item], variant_key[item])
+            else:
+                task_key[item] = variant_key[item]
+        return task_key
+
     def apply_variant(variant, task):
         task["description"] = variant["description"].format(**task)
 
@@ -94,7 +102,9 @@ def split_variants(config, tasks):
         task["variant-suffix"] += suffix
 
         # Replace and/or merge the configuration.
-        task.update(variant.get("replace", {}))
+
+        # we only want to update the leaf node, the the entire top level dict
+        task = replace_task_items(task, variant.get("replace", {}))
         return merge(task, variant.get("merge", {}))
 
     expired_variants = find_expired_variants(TEST_VARIANTS)
diff --git a/taskcluster/gecko_taskgraph/transforms/upload_generated_sources.py b/taskcluster/gecko_taskgraph/transforms/upload_generated_sources.py
index aea948f90e..3828e912ec 100644
--- a/taskcluster/gecko_taskgraph/transforms/upload_generated_sources.py
+++ b/taskcluster/gecko_taskgraph/transforms/upload_generated_sources.py
@@ -3,7 +3,7 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 """
 Transform the upload-generated-files task description template,
-taskcluster/ci/upload-generated-sources/kind.yml, into an actual task description.
+taskcluster/kinds/upload-generated-sources/kind.yml, into an actual task description.
 """
 
 from taskgraph.transforms.base import TransformSequence
diff --git a/taskcluster/gecko_taskgraph/transforms/upload_symbols.py b/taskcluster/gecko_taskgraph/transforms/upload_symbols.py
index 5c0bf18cb0..b216d2c8e1 100644
--- a/taskcluster/gecko_taskgraph/transforms/upload_symbols.py
+++ b/taskcluster/gecko_taskgraph/transforms/upload_symbols.py
@@ -3,7 +3,7 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 """
 Transform the upload-symbols task description template,
-taskcluster/ci/upload-symbols/job-template.yml into an actual task description.
+taskcluster/kinds/upload-symbols/job-template.yml into an actual task description.
 """
 
 
diff --git a/taskcluster/gecko_taskgraph/util/chunking.py b/taskcluster/gecko_taskgraph/util/chunking.py
index a8ae4d8b6b..9d8b98e07b 100644
--- a/taskcluster/gecko_taskgraph/util/chunking.py
+++ b/taskcluster/gecko_taskgraph/util/chunking.py
@@ -24,8 +24,8 @@ here = os.path.abspath(os.path.dirname(__file__))
 resolver = TestResolver.from_environment(cwd=here, loader_cls=TestManifestLoader)
 
 TEST_VARIANTS = {}
-if os.path.exists(os.path.join(GECKO, "taskcluster", "ci", "test", "variants.yml")):
-    TEST_VARIANTS = load_yaml(GECKO, "taskcluster", "ci", "test", "variants.yml")
+if os.path.exists(os.path.join(GECKO, "taskcluster", "kinds", "test", "variants.yml")):
+    TEST_VARIANTS = load_yaml(GECKO, "taskcluster", "kinds", "test", "variants.yml")
 
 WPT_SUBSUITES = {
     "canvas": "html/canvas",
diff --git a/taskcluster/gecko_taskgraph/util/docker.py b/taskcluster/gecko_taskgraph/util/docker.py
index e8de7d1fdb..51e3f7e484 100644
--- a/taskcluster/gecko_taskgraph/util/docker.py
+++ b/taskcluster/gecko_taskgraph/util/docker.py
@@ -298,7 +298,7 @@ class ImagePathsMap(Mapping):
         self.__update_image_paths(jobs, image_dir)
 
 
-image_paths = ImagePathsMap("taskcluster/ci/docker-image/kind.yml")
+image_paths = ImagePathsMap("taskcluster/kinds/docker-image/kind.yml")
 
 
 def image_path(name):
diff --git a/taskcluster/gecko_taskgraph/util/hg.py b/taskcluster/gecko_taskgraph/util/hg.py
index 17d341cdc0..d03af87f13 100644
--- a/taskcluster/gecko_taskgraph/util/hg.py
+++ b/taskcluster/gecko_taskgraph/util/hg.py
@@ -96,15 +96,15 @@ def get_push_data(repository, project, push_id_start, push_id_end):
 
 
 @memoize
-def get_json_automationrelevance(repository, revision):
-    url = "{}/json-automationrelevance/{}".format(repository.rstrip("/"), revision)
+def get_json_pushchangedfiles(repository, revision):
+    url = "{}/json-pushchangedfiles/{}".format(repository.rstrip("/"), revision)
     logger.debug("Querying version control for metadata: %s", url)
 
-    def get_automationrelevance():
+    def get_pushchangedfiles():
         response = requests.get(url, timeout=60)
         return response.json()
 
-    return retry(get_automationrelevance, attempts=10, sleeptime=10)
+    return retry(get_pushchangedfiles, attempts=10, sleeptime=10)
 
 
 def get_hg_revision_branch(root, revision):
diff --git a/taskcluster/gecko_taskgraph/util/partners.py b/taskcluster/gecko_taskgraph/util/partners.py
index 2546e1ae88..f4b8b187cf 100644
--- a/taskcluster/gecko_taskgraph/util/partners.py
+++ b/taskcluster/gecko_taskgraph/util/partners.py
@@ -523,7 +523,7 @@ def apply_partner_priority(config, jobs):
     # Reduce the priority of the partner repack jobs because they don't block QE. Meanwhile
     # leave EME-free jobs alone because they do, and they'll get the branch priority like the rest
     # of the release. Only bother with this in production, not on staging releases on try.
-    # medium is the same as mozilla-central, see taskcluster/ci/config.yml. ie higher than
+    # medium is the same as mozilla-central, see taskcluster/config.yml. ie higher than
     # integration branches because we don't want to wait a lot for the graph to be done, but
     # for multiple releases the partner tasks always wait for non-partner.
     if (
diff --git a/taskcluster/gecko_taskgraph/util/platforms.py b/taskcluster/gecko_taskgraph/util/platforms.py
index 2c423223fe..3010b32792 100644
--- a/taskcluster/gecko_taskgraph/util/platforms.py
+++ b/taskcluster/gecko_taskgraph/util/platforms.py
@@ -27,7 +27,8 @@ _executable_extension = {
 
 _architectures = {
     r"linux\b.*": "x86",
-    r"linux64\b.*": "x86_64",
+    r"linux64\b(?!-aarch64).*": "x86_64",
+    r"linux64-aarch64\b.*": "aarch64",
     r"macosx64\b.*": "macos-x86_64-aarch64",
     r"win32\b.*": "x86",
     r"win64\b(?!-aarch64).*": "x86_64",
diff --git a/taskcluster/gecko_taskgraph/util/signed_artifacts.py b/taskcluster/gecko_taskgraph/util/signed_artifacts.py
index 2467ff8046..61dad14abf 100644
--- a/taskcluster/gecko_taskgraph/util/signed_artifacts.py
+++ b/taskcluster/gecko_taskgraph/util/signed_artifacts.py
@@ -57,7 +57,7 @@ def generate_specifications_of_artifacts_to_sign(
     elif "macosx" in build_platform:
         langpack_formats = []
         if is_notarization_kind(config.kind):
-            formats = ["apple_notarization"]
+            formats = ["apple_notarization_stacked"]
             artifacts_specifications = [
                 {
                     "artifacts": [
diff --git a/taskcluster/gecko_taskgraph/util/taskcluster.py b/taskcluster/gecko_taskgraph/util/taskcluster.py
index cddb01fd37..826eee4cdb 100644
--- a/taskcluster/gecko_taskgraph/util/taskcluster.py
+++ b/taskcluster/gecko_taskgraph/util/taskcluster.py
@@ -24,7 +24,7 @@ def insert_index(index_path, task_id, data=None, use_proxy=False):
     index_url = get_index_url(index_path, use_proxy=use_proxy)
 
     # Find task expiry.
-    expires = get_task_definition(task_id, use_proxy=use_proxy)["expires"]
+    expires = get_task_definition(task_id, use_proxy)["expires"]
 
     response = _do_request(
         index_url,
diff --git a/taskcluster/ci/addon/kind.yml b/taskcluster/kinds/addon/kind.yml
index eb24cf6a41..eb24cf6a41 100644
--- a/taskcluster/ci/addon/kind.yml
+++ b/taskcluster/kinds/addon/kind.yml
diff --git a/taskcluster/ci/android-l10n/kind.yml b/taskcluster/kinds/android-l10n/kind.yml
index 8e5d35995d..774be4053c 100644
--- a/taskcluster/ci/android-l10n/kind.yml
+++ b/taskcluster/kinds/android-l10n/kind.yml
@@ -19,7 +19,6 @@ job-defaults:
         tags: []
         bump: false
         dontbuild: false
-        ignore-closed-tree: true
         push: true
 
 jobs:
@@ -29,6 +28,7 @@ jobs:
         treeherder:
             symbol: android-l10n(I)
         worker:
+            ignore-closed-tree: true
             source-repo: https://hg.mozilla.org/integration/autoland
             android-l10n-import-info:
                 from-repo-url: https://github.com/mozilla-l10n/android-l10n
@@ -46,6 +46,7 @@ jobs:
         treeherder:
             symbol: android-l10n(S)
         worker:
+            ignore-closed-tree: false
             source-repo: https://hg.mozilla.org/releases/mozilla-beta
             android-l10n-sync-info:
                 from-repo-url: https://hg.mozilla.org/mozilla-central
diff --git a/taskcluster/ci/android-startup-test/kind.yml b/taskcluster/kinds/android-startup-test/kind.yml
index d7fe550f99..d7fe550f99 100644
--- a/taskcluster/ci/android-startup-test/kind.yml
+++ b/taskcluster/kinds/android-startup-test/kind.yml
diff --git a/taskcluster/ci/artifact-build/kind.yml b/taskcluster/kinds/artifact-build/kind.yml
index d91249fce9..5029597c4e 100644
--- a/taskcluster/ci/artifact-build/kind.yml
+++ b/taskcluster/kinds/artifact-build/kind.yml
@@ -10,6 +10,7 @@ kind-dependencies:
 
 transforms:
     - gecko_taskgraph.transforms.build_attrs:transforms
+    - gecko_taskgraph.transforms.build_schedules:transforms
     - gecko_taskgraph.transforms.build_lints:transforms
     - gecko_taskgraph.transforms.job:transforms
     - gecko_taskgraph.transforms.artifact:transforms
diff --git a/taskcluster/ci/attribution-l10n/kind.yml b/taskcluster/kinds/attribution-l10n/kind.yml
index 48774cb1f6..48774cb1f6 100644
--- a/taskcluster/ci/attribution-l10n/kind.yml
+++ b/taskcluster/kinds/attribution-l10n/kind.yml
diff --git a/taskcluster/ci/attribution/kind.yml b/taskcluster/kinds/attribution/kind.yml
index 9fac5ac71d..9fac5ac71d 100644
--- a/taskcluster/ci/attribution/kind.yml
+++ b/taskcluster/kinds/attribution/kind.yml
diff --git a/taskcluster/ci/balrog/kind.yml b/taskcluster/kinds/balrog/kind.yml
index 324ef2c521..324ef2c521 100644
--- a/taskcluster/ci/balrog/kind.yml
+++ b/taskcluster/kinds/balrog/kind.yml
diff --git a/taskcluster/ci/beetmover-android-app/kind.yml b/taskcluster/kinds/beetmover-android-app/kind.yml
index 59ef9cb149..59ef9cb149 100644
--- a/taskcluster/ci/beetmover-android-app/kind.yml
+++ b/taskcluster/kinds/beetmover-android-app/kind.yml
diff --git a/taskcluster/ci/beetmover-apt/kind.yml b/taskcluster/kinds/beetmover-apt/kind.yml
index 9eb65f8858..f19fe59fb1 100644
--- a/taskcluster/ci/beetmover-apt/kind.yml
+++ b/taskcluster/kinds/beetmover-apt/kind.yml
@@ -16,6 +16,7 @@ kind-dependencies:
 only-for-build-platforms:
     - linux-shippable/opt
     - linux64-shippable/opt
+    - linux64-aarch64-shippable/opt
     - linux-devedition/opt
     - linux64-devedition/opt
 
diff --git a/taskcluster/ci/beetmover-checksums/kind.yml b/taskcluster/kinds/beetmover-checksums/kind.yml
index 7ecf79ea58..7ecf79ea58 100644
--- a/taskcluster/ci/beetmover-checksums/kind.yml
+++ b/taskcluster/kinds/beetmover-checksums/kind.yml
diff --git a/taskcluster/ci/beetmover-components/kind.yml b/taskcluster/kinds/beetmover-components/kind.yml
index 3b3fd5c8ea..3b3fd5c8ea 100644
--- a/taskcluster/ci/beetmover-components/kind.yml
+++ b/taskcluster/kinds/beetmover-components/kind.yml
diff --git a/taskcluster/ci/beetmover-geckoview/kind.yml b/taskcluster/kinds/beetmover-geckoview/kind.yml
index d37316c5da..d37316c5da 100644
--- a/taskcluster/ci/beetmover-geckoview/kind.yml
+++ b/taskcluster/kinds/beetmover-geckoview/kind.yml
diff --git a/taskcluster/ci/beetmover-repackage/kind.yml b/taskcluster/kinds/beetmover-repackage/kind.yml
index 8746bb5b44..e037f5ca86 100644
--- a/taskcluster/ci/beetmover-repackage/kind.yml
+++ b/taskcluster/kinds/beetmover-repackage/kind.yml
@@ -40,6 +40,7 @@ kind-dependencies:
 only-for-build-platforms:
     - linux-shippable/opt
     - linux64-shippable/opt
+    - linux64-aarch64-shippable/opt
     - macosx64-shippable/opt
     - win32-shippable/opt
     - win64-shippable/opt
diff --git a/taskcluster/ci/beetmover-source/kind.yml b/taskcluster/kinds/beetmover-source/kind.yml
index cd86d812b5..cd86d812b5 100644
--- a/taskcluster/ci/beetmover-source/kind.yml
+++ b/taskcluster/kinds/beetmover-source/kind.yml
diff --git a/taskcluster/ci/bootstrap/kind.yml b/taskcluster/kinds/bootstrap/kind.yml
index 0ce8f8f68a..0ce8f8f68a 100644
--- a/taskcluster/ci/bootstrap/kind.yml
+++ b/taskcluster/kinds/bootstrap/kind.yml
diff --git a/taskcluster/ci/bouncer-locations/kind.yml b/taskcluster/kinds/bouncer-locations/kind.yml
index 4234939369..4234939369 100644
--- a/taskcluster/ci/bouncer-locations/kind.yml
+++ b/taskcluster/kinds/bouncer-locations/kind.yml
diff --git a/taskcluster/ci/build-apk/kind.yml b/taskcluster/kinds/build-apk/kind.yml
index 99132d17f8..ef909b2c44 100644
--- a/taskcluster/ci/build-apk/kind.yml
+++ b/taskcluster/kinds/build-apk/kind.yml
@@ -19,6 +19,8 @@ job-defaults:
         type: file
         name: 'public/build/target.{abi}.apk'
         path: '/builds/worker/checkouts/gecko/mobile/android/{source_project_name}/app/build/outputs/apk/{gradle_build}/{gradle_build_type}/{fileName}'
+    attributes:
+        build_platform: android
 
 
 jobs:
diff --git a/taskcluster/ci/build-bundle/kind.yml b/taskcluster/kinds/build-bundle/kind.yml
index 081b5aba60..7db4cfdd81 100644
--- a/taskcluster/ci/build-bundle/kind.yml
+++ b/taskcluster/kinds/build-bundle/kind.yml
@@ -19,6 +19,8 @@ job-defaults:
         type: file
         name: 'public/build/target.aab'
         path: '/builds/worker/checkouts/gecko/mobile/android/{source_project_name}/app/build/outputs/bundle/{variant_name}/app-{gradle_build}-{gradle_build_type}.aab'
+    attributes:
+        build_platform: android
     run:
         gradle-package-command: bundle
         gradle-extra-options:
diff --git a/taskcluster/ci/build-components/kind.yml b/taskcluster/kinds/build-components/kind.yml
index 4d9ae555fa..52793cb3f1 100644
--- a/taskcluster/ci/build-components/kind.yml
+++ b/taskcluster/kinds/build-components/kind.yml
@@ -39,10 +39,11 @@ job-defaults:
         toolchain:
             - android-sdk-linux
             - android-gradle-dependencies
-            - android-gradle-python-envs
             - linux64-jdk
         build-fat-aar:
             - target.maven.tar.xz
+    attributes:
+        build_platform: android
     dependencies:
         build-fat-aar:
             by-build-type:
diff --git a/taskcluster/ci/build-fat-aar/kind.yml b/taskcluster/kinds/build-fat-aar/kind.yml
index 0d3b1208ec..38d40efc92 100644
--- a/taskcluster/ci/build-fat-aar/kind.yml
+++ b/taskcluster/kinds/build-fat-aar/kind.yml
@@ -11,6 +11,7 @@ kind-dependencies:
 transforms:
     - gecko_taskgraph.transforms.build:transforms
     - gecko_taskgraph.transforms.build_attrs:transforms
+    - gecko_taskgraph.transforms.build_schedules:transforms
     - gecko_taskgraph.transforms.build_lints:transforms
     - gecko_taskgraph.transforms.build_fat_aar:transforms
     - gecko_taskgraph.transforms.job:transforms
@@ -86,7 +87,6 @@ job-defaults:
                 default: null
     fetches:
         toolchain:
-            - android-gradle-python-envs
             - android-ndk-linux
             - android-sdk-linux
             - linux64-clang
diff --git a/taskcluster/ci/build-mac-notarization/kind.yml b/taskcluster/kinds/build-mac-notarization/kind.yml
index 8d049b3695..910d6a1797 100644
--- a/taskcluster/ci/build-mac-notarization/kind.yml
+++ b/taskcluster/kinds/build-mac-notarization/kind.yml
@@ -29,6 +29,6 @@ jobs:
               paths:
                   - public/build/target.tar.gz
                   - public/build/target.pkg
-              formats: ["apple_notarization"]
+              formats: ["apple_notarization_stacked"]
               taskId:
                   task-reference: <build-mac-signing>
diff --git a/taskcluster/ci/build-mac-signing/kind.yml b/taskcluster/kinds/build-mac-signing/kind.yml
index d90813cd96..d90813cd96 100644
--- a/taskcluster/ci/build-mac-signing/kind.yml
+++ b/taskcluster/kinds/build-mac-signing/kind.yml
diff --git a/taskcluster/ci/build-samples-browser/kind.yml b/taskcluster/kinds/build-samples-browser/kind.yml
index 8949d70fad..6d1d903321 100644
--- a/taskcluster/ci/build-samples-browser/kind.yml
+++ b/taskcluster/kinds/build-samples-browser/kind.yml
@@ -17,6 +17,7 @@ kind-dependencies:
 
 job-defaults:
     attributes:
+        build_platform: android
         build-type: regular
         component: samples-browser
     dependencies:
@@ -26,7 +27,6 @@ job-defaults:
         toolchain:
             - android-sdk-linux
             - android-gradle-dependencies
-            - android-gradle-python-envs
             - linux64-jdk
         build-fat-aar:
             - target.maven.tar.xz
diff --git a/taskcluster/ci/build-signing/kind.yml b/taskcluster/kinds/build-signing/kind.yml
index 7e4bbab419..7e4bbab419 100644
--- a/taskcluster/ci/build-signing/kind.yml
+++ b/taskcluster/kinds/build-signing/kind.yml
diff --git a/taskcluster/ci/build/android-asan.yml b/taskcluster/kinds/build/android-asan.yml
index ac0ff56251..4cc846dece 100644
--- a/taskcluster/ci/build/android-asan.yml
+++ b/taskcluster/kinds/build/android-asan.yml
@@ -71,6 +71,5 @@ android-x86_64-asan-fuzzing/opt:
             - linux64-clang
             - linux64-sccache
             - android-gradle-dependencies
-            - android-gradle-python-envs
     optimization:
         skip-unless-expanded: null
diff --git a/taskcluster/ci/build/android-stuff.yml b/taskcluster/kinds/build/android-stuff.yml
index cf4c44124d..52bed7b18f 100644
--- a/taskcluster/ci/build/android-stuff.yml
+++ b/taskcluster/kinds/build/android-stuff.yml
@@ -43,7 +43,6 @@ android-geckoview-docs/opt:
     fetches:
         toolchain:
             - android-gradle-dependencies
-            - android-gradle-python-envs
             - android-sdk-linux
             - linux64-jdk
             - linux64-node
diff --git a/taskcluster/ci/build/android.yml b/taskcluster/kinds/build/android.yml
index ac3d2a5a31..7c37b2680f 100644
--- a/taskcluster/ci/build/android.yml
+++ b/taskcluster/kinds/build/android.yml
@@ -58,7 +58,6 @@ job-defaults:
             - linux64-node
             - sysroot-x86_64-linux-gnu
             - sysroot-wasm32-wasi
-            - android-gradle-python-envs
 
 android-arm/debug:
     description: "Android 5.0 Arm Debug"
diff --git a/taskcluster/ci/build/ios.yml b/taskcluster/kinds/build/ios.yml
index 1e8c18caab..1e8c18caab 100644
--- a/taskcluster/ci/build/ios.yml
+++ b/taskcluster/kinds/build/ios.yml
diff --git a/taskcluster/ci/build/kind.yml b/taskcluster/kinds/build/kind.yml
index 2e49ca18c5..2e49ca18c5 100644
--- a/taskcluster/ci/build/kind.yml
+++ b/taskcluster/kinds/build/kind.yml
diff --git a/taskcluster/ci/build/linux-base-toolchains.yml b/taskcluster/kinds/build/linux-base-toolchains.yml
index 1cde0b229f..1cde0b229f 100644
--- a/taskcluster/ci/build/linux-base-toolchains.yml
+++ b/taskcluster/kinds/build/linux-base-toolchains.yml
diff --git a/taskcluster/ci/build/linux.yml b/taskcluster/kinds/build/linux.yml
index 99eae6639e..0cf201a22d 100644
--- a/taskcluster/ci/build/linux.yml
+++ b/taskcluster/kinds/build/linux.yml
@@ -1084,6 +1084,56 @@ linux64-asan-fuzzing/noopt:
     optimization:
         skip-unless-expanded: null
 
+linux64-asan-fuzzing-afl/opt:
+    description: "Linux64 Fuzzing Opt ASAN AFL"
+    index:
+        product: firefox
+        job-name: linux64-fuzzing-asan-afl-opt
+    attributes:
+        # The gtest libxul contains libFuzzer targets
+        skip-verify-test-packaging: true
+    treeherder:
+        platform: linux64/asan
+        symbol: Boaf
+    worker:
+        env:
+            PERFHERDER_EXTRA_OPTIONS: asan-fuzzing-afl
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+            AFL_CC: /builds/worker/fetches/clang/bin/clang
+            AFL_CXX: /builds/worker/fetches/clang/bin/clang++
+            AFL_LLVM_INSTRUMENT: llvmnative
+            AFL_LLVM_NO_RPATH: "1"
+        max-run-time: 7200
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        custom-build-variant-cfg: fuzzing-asan-tc
+        mozconfig-variant: nightly-fuzzing-asan-afl
+        tooltool-downloads: public
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-afl-instrumentation
+            - linux64-clang
+            - linux64-rust-dev
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump_syms
+            - linux64-llvm-symbolizer
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-pkgconf
+            - sysroot-x86_64-linux-gnu
+            - sysroot-wasm32-wasi
+    optimization:
+        skip-unless-expanded: null
+
 linux64-asan-fuzzing-nyx/opt:
     description: "Linux64 Fuzzing Opt ASAN NYX"
     index:
diff --git a/taskcluster/ci/build/macosx-native.yml b/taskcluster/kinds/build/macosx-native.yml
index ad77b6e5aa..ad77b6e5aa 100644
--- a/taskcluster/ci/build/macosx-native.yml
+++ b/taskcluster/kinds/build/macosx-native.yml
diff --git a/taskcluster/ci/build/macosx.yml b/taskcluster/kinds/build/macosx.yml
index 928350e1bf..64e71a0b4b 100644
--- a/taskcluster/ci/build/macosx.yml
+++ b/taskcluster/kinds/build/macosx.yml
@@ -409,6 +409,9 @@ macosx64-devedition/opt:
             - artifact: target.perftests.tests.tar.gz
               extract: false
               dest: ../artifacts
+            - artifact: target.update_framework_artifacts.zip
+              extract: false
+              dest: ../artifacts
             - artifact: target.xpt_artifacts.zip
               extract: false
               dest: ../artifacts
@@ -831,6 +834,9 @@ macosx64-shippable/opt:
             - artifact: target.perftests.tests.tar.gz
               extract: false
               dest: ../artifacts
+            - artifact: target.update_framework_artifacts.zip
+              extract: false
+              dest: ../artifacts
             - artifact: target.xpt_artifacts.zip
               extract: false
               dest: ../artifacts
diff --git a/taskcluster/ci/build/windows-mingw.yml b/taskcluster/kinds/build/windows-mingw.yml
index 09c3ee0022..09c3ee0022 100644
--- a/taskcluster/ci/build/windows-mingw.yml
+++ b/taskcluster/kinds/build/windows-mingw.yml
diff --git a/taskcluster/ci/build/windows.yml b/taskcluster/kinds/build/windows.yml
index af0bebb4f0..af0bebb4f0 100644
--- a/taskcluster/ci/build/windows.yml
+++ b/taskcluster/kinds/build/windows.yml
diff --git a/taskcluster/ci/code-review/kind.yml b/taskcluster/kinds/code-review/kind.yml
index 16586e5a20..16586e5a20 100644
--- a/taskcluster/ci/code-review/kind.yml
+++ b/taskcluster/kinds/code-review/kind.yml
diff --git a/taskcluster/ci/condprof/kind.yml b/taskcluster/kinds/condprof/kind.yml
index d1e50620c8..d1e50620c8 100644
--- a/taskcluster/ci/condprof/kind.yml
+++ b/taskcluster/kinds/condprof/kind.yml
diff --git a/taskcluster/ci/cron-bouncer-check/kind.yml b/taskcluster/kinds/cron-bouncer-check/kind.yml
index 62d2c80960..62d2c80960 100644
--- a/taskcluster/ci/cron-bouncer-check/kind.yml
+++ b/taskcluster/kinds/cron-bouncer-check/kind.yml
diff --git a/taskcluster/ci/diffoscope/artifacts.yml b/taskcluster/kinds/diffoscope/artifacts.yml
index b06604f3cb..a89dfcbfee 100644
--- a/taskcluster/ci/diffoscope/artifacts.yml
+++ b/taskcluster/kinds/diffoscope/artifacts.yml
@@ -17,8 +17,12 @@ job-defaults:
         # bug 1825141 - telemetry.fog.artifact_build isn't stable between
         # artifact and not-artifact builds, so remove its line if present.
         - sed -i '/telemetry\.fog\.artifact\_build/d' b/"$RESOURCE_DIR"/browser/defaults/preferences/firefox.js
-        # artifact builds are not fed with accepted-mar-channel-ids
+        # non-macOS artifact builds are not fed with accepted-mar-channel-ids.
         - if [ -f a/"$RESOURCE_DIR"/update-settings.ini ]; then sed -i '/ACCEPTED_MAR_CHANNEL_IDS/d' {a,b}/"$RESOURCE_DIR"/update-settings.ini; fi
+        # macOS artifact builds have local update configurations, not Nightly
+        # update configurations.
+        - rm -f {a,b}/"$RESOURCE_DIR"/../Frameworks/ChannelPrefs.framework/ChannelPrefs
+        - rm -f {a,b}/"$RESOURCE_DIR"/../MacOS/updater.app/Contents/Frameworks/UpdateSettings.framework/UpdateSettings
     # Extra diffoscope arguments to account for:
     # - about:buildconfig being expectedly different.
     extra-args: >-
diff --git a/taskcluster/ci/diffoscope/kind.yml b/taskcluster/kinds/diffoscope/kind.yml
index 89b38fc665..89b38fc665 100644
--- a/taskcluster/ci/diffoscope/kind.yml
+++ b/taskcluster/kinds/diffoscope/kind.yml
diff --git a/taskcluster/ci/diffoscope/reproducible.yml b/taskcluster/kinds/diffoscope/reproducible.yml
index 4f89bfca4e..4f89bfca4e 100644
--- a/taskcluster/ci/diffoscope/reproducible.yml
+++ b/taskcluster/kinds/diffoscope/reproducible.yml
diff --git a/taskcluster/ci/docker-image/kind.yml b/taskcluster/kinds/docker-image/kind.yml
index 12dc16cdd1..22b18cf16f 100644
--- a/taskcluster/ci/docker-image/kind.yml
+++ b/taskcluster/kinds/docker-image/kind.yml
@@ -214,9 +214,6 @@ jobs:
     condprof:
         symbol: I(condprof)
         parent: ubuntu1804-test
-    github-sync:
-        symbol: I(github-sync)
-        parent: debian12-base
     sentry:
         symbol: I(sentry)
         parent: debian12-base
diff --git a/taskcluster/ci/fetch/benchmarks.yml b/taskcluster/kinds/fetch/benchmarks.yml
index 7e31470baf..7e31470baf 100644
--- a/taskcluster/ci/fetch/benchmarks.yml
+++ b/taskcluster/kinds/fetch/benchmarks.yml
diff --git a/taskcluster/ci/fetch/browsertime.yml b/taskcluster/kinds/fetch/browsertime.yml
index 730ca3c279..a495ec04a3 100644
--- a/taskcluster/ci/fetch/browsertime.yml
+++ b/taskcluster/kinds/fetch/browsertime.yml
@@ -77,15 +77,15 @@ mac-arm-chromedriver-122:
         sha256: 645f277c05d7f7d238c7a45412f42489767f48cba05d8632ce00b54b3704d4e1
         size: 8293896
 
-win32-chromedriver-123:
-    description: "Win32 chromedriver v123"
+win64-chromedriver-123:
+    description: "Win64 chromedriver v123"
     fetch:
         type: static-url
-        artifact-name: chromedriver_win32_123.tar.zst
+        artifact-name: chromedriver_win64_123.tar.zst
         add-prefix: "123"
-        url: "https://storage.googleapis.com/chrome-for-testing-public/123.0.6312.58/win32/chromedriver-win32.zip"
-        sha256: 5367d72e2a90463bda103450b893ec12a7272dc62094d230a4433c449b96993e
-        size: 8125668
+        url: "https://storage.googleapis.com/chrome-for-testing-public/123.0.6312.58/win64/chromedriver-win64.zip"
+        sha256: 2c54d5c120fc4371d769c9ae30f3cb6708d7568c99c5965e4f1bb476d1d5997f
+        size: 8567770
 
 linux64-chromedriver-123:
     description: "Linux64 chromedriver v123"
@@ -117,16 +117,6 @@ mac-arm-chromedriver-123:
         sha256: 4ccade08517d2e8fbd832ee4cd959df4c8dea740986b70b19f892bf413537641
         size: 9325268
 
-win32-chromedriver-124:
-    description: "Win32 chromedriver v124"
-    fetch:
-        type: static-url
-        artifact-name: chromedriver_win32_124.tar.zst
-        add-prefix: "124"
-        url: "https://storage.googleapis.com/chrome-for-testing-public/124.0.6367.29/win32/chromedriver-win32.zip"
-        sha256: 5a47fb7ed7094021fd3faa25fcdaf69e893082e3b0f5d31f9d341082eceb80dc
-        size: 8171680
-
 win64-chromedriver-124:
     description: "Win64 chromedriver v124"
     fetch:
diff --git a/taskcluster/ci/fetch/chromium-fetch.yml b/taskcluster/kinds/fetch/chromium-fetch.yml
index 88f7e4fc62..f99e1325cd 100644
--- a/taskcluster/ci/fetch/chromium-fetch.yml
+++ b/taskcluster/kinds/fetch/chromium-fetch.yml
@@ -7,32 +7,42 @@ job-defaults:
         type: chromium-fetch
         script: /builds/worker/bin/fetch-chromium.py
 
-linux64-chromium:
-    description: 'Linux64 Chromium Fetch'
+linux64-chromiumdriver:
+    description: 'Linux64 Chromium Trunk Chromedriver Fetch'
+    attributes:
+        cached_task: false
     fetch:
         platform: linux
         artifact-name: chromium-linux.tar.bz2
 
-win32-chromium:
-    description: 'Windows32 Chromium Fetch'
+win32-chromiumdriver:
+    description: 'Windows32 Chromium Trunk Chromedriver Fetch'
+    attributes:
+        cached_task: false
     fetch:
         platform: win32
         artifact-name: chromium-win32.tar.bz2
 
-win64-chromium:
-    description: 'Windows64 Chromium Fetch'
+win64-chromiumdriver:
+    description: 'Windows64 Chromium Trunk Chromedriver Fetch'
+    attributes:
+        cached_task: false
     fetch:
         platform: win64
         artifact-name: chromium-win64.tar.bz2
 
-mac-chromium:
-    description: 'MacOSX Chromium Fetch'
+mac-chromiumdriver:
+    description: 'MacOSX Chromium Trunk Chromedriver Fetch'
+    attributes:
+        cached_task: false
     fetch:
         platform: mac
         artifact-name: chromium-mac.tar.bz2
 
-mac-chromium-arm:
-    description: 'MacOSX ARM Chromium Fetch'
+mac-chromiumdriver-arm:
+    description: 'MacOSX ARM Chromium Trunk Chromedriver Fetch'
+    attributes:
+        cached_task: false
     fetch:
         platform: mac-arm
         artifact-name: chromium-mac-arm.tar.bz2
diff --git a/taskcluster/ci/fetch/kind.yml b/taskcluster/kinds/fetch/kind.yml
index 027ab7f1eb..027ab7f1eb 100644
--- a/taskcluster/ci/fetch/kind.yml
+++ b/taskcluster/kinds/fetch/kind.yml
diff --git a/taskcluster/ci/fetch/moz.build b/taskcluster/kinds/fetch/moz.build
index 28b8003edf..28b8003edf 100644
--- a/taskcluster/ci/fetch/moz.build
+++ b/taskcluster/kinds/fetch/moz.build
diff --git a/taskcluster/ci/fetch/resource-monitor.yml b/taskcluster/kinds/fetch/resource-monitor.yml
index 2fe94cb4f9..2fe94cb4f9 100644
--- a/taskcluster/ci/fetch/resource-monitor.yml
+++ b/taskcluster/kinds/fetch/resource-monitor.yml
diff --git a/taskcluster/ci/fetch/toolchain-clang-tidy-external.yml b/taskcluster/kinds/fetch/toolchain-clang-tidy-external.yml
index d71058c06b..d71058c06b 100644
--- a/taskcluster/ci/fetch/toolchain-clang-tidy-external.yml
+++ b/taskcluster/kinds/fetch/toolchain-clang-tidy-external.yml
diff --git a/taskcluster/ci/fetch/toolchains.yml b/taskcluster/kinds/fetch/toolchains.yml
index 9c58eaddc7..10a63bfffd 100644
--- a/taskcluster/ci/fetch/toolchains.yml
+++ b/taskcluster/kinds/fetch/toolchains.yml
@@ -362,11 +362,11 @@ clang-17:
         revision: 6009708b4367171ccdbf4b5905cb6a803753fe18
 
 clang-18:
-    description: clang 18.1.1 source code
+    description: clang 18.1.5 source code
     fetch:
         type: git
         repo: https://github.com/llvm/llvm-project
-        revision: dba2a75e9c7ef81fe84774ba5eee5e67e01d801a
+        revision: 617a15a9eac96088ae5e9134248d8236e34b91b1
 
 clang-trunk:
     description: clang main branch source code
@@ -466,9 +466,9 @@ jdk-8-linux64:
     description: Java 8 JDK
     fetch:
         type: static-url
-        url: https://github.com/adoptium/temurin8-binaries/releases/download/jdk8u312-b07/OpenJDK8U-jdk_x64_linux_hotspot_8u312b07.tar.gz
-        sha256: 699981083983b60a7eeb511ad640fae3ae4b879de5a3980fe837e8ade9c34a08
-        size: 103016010
+        url: https://github.com/adoptium/temurin8-binaries/releases/download/jdk8u412-b08/OpenJDK8U-jdk_x64_linux_hotspot_8u412b08.tar.gz
+        sha256: b9884a96f78543276a6399c3eb8c2fd8a80e6b432ea50e87d3d12d495d1d2808
+        size: 103005511
         artifact-name: jdk-8.tar.zst
         strip-components: 1
         add-prefix: jdk-8/
@@ -594,7 +594,7 @@ symbol-scrapers:
     fetch:
         type: git
         repo: https://github.com/mozilla/symbol-scrapers
-        revision: 95ea2e4c5f82469cb394620c8d332e3457466e45
+        revision: defbe6b01a661b8c3f1de943e40554a093b26fe9
 
 xz-5.4.4:
     description: xz 5.4.4 source code
diff --git a/taskcluster/ci/fetch/updatebot.yml b/taskcluster/kinds/fetch/updatebot.yml
index b757a383f8..b757a383f8 100644
--- a/taskcluster/ci/fetch/updatebot.yml
+++ b/taskcluster/kinds/fetch/updatebot.yml
diff --git a/taskcluster/ci/fuzzing/kind.yml b/taskcluster/kinds/fuzzing/kind.yml
index 444240c619..444240c619 100644
--- a/taskcluster/ci/fuzzing/kind.yml
+++ b/taskcluster/kinds/fuzzing/kind.yml
diff --git a/taskcluster/ci/fxrecord/kind.yml b/taskcluster/kinds/fxrecord/kind.yml
index 7ff7816e7e..7ff7816e7e 100644
--- a/taskcluster/ci/fxrecord/kind.yml
+++ b/taskcluster/kinds/fxrecord/kind.yml
diff --git a/taskcluster/ci/geckodriver-mac-notarization/kind.yml b/taskcluster/kinds/geckodriver-mac-notarization/kind.yml
index a90e6faa2e..a90e6faa2e 100644
--- a/taskcluster/ci/geckodriver-mac-notarization/kind.yml
+++ b/taskcluster/kinds/geckodriver-mac-notarization/kind.yml
diff --git a/taskcluster/ci/geckodriver-signing/kind.yml b/taskcluster/kinds/geckodriver-signing/kind.yml
index 08007495e5..08007495e5 100644
--- a/taskcluster/ci/geckodriver-signing/kind.yml
+++ b/taskcluster/kinds/geckodriver-signing/kind.yml
diff --git a/taskcluster/ci/generate-profile/kind.yml b/taskcluster/kinds/generate-profile/kind.yml
index b71afb23d0..35d751ca80 100644
--- a/taskcluster/ci/generate-profile/kind.yml
+++ b/taskcluster/kinds/generate-profile/kind.yml
@@ -10,6 +10,7 @@ kind-dependencies:
 
 transforms:
     - gecko_taskgraph.transforms.build_attrs:transforms
+    - gecko_taskgraph.transforms.build_schedules:transforms
     - gecko_taskgraph.transforms.release_deps:transforms
     - gecko_taskgraph.transforms.run_pgo_profile:transforms
     - gecko_taskgraph.transforms.job:transforms
@@ -98,7 +99,7 @@ jobs:
         worker-type: t-linux-xlarge-pgo
         worker:
             chain-of-trust: true
-            max-run-time: 2700
+            max-run-time: 3600
             docker-image: {in-tree: ubuntu1804-test}
             env:
                 WORKING_DIR: "/builds/worker"
@@ -140,7 +141,7 @@ jobs:
         worker-type: t-linux-xlarge-pgo
         worker:
             chain-of-trust: true
-            max-run-time: 2700
+            max-run-time: 3600
             docker-image: {in-tree: ubuntu1804-test}
             env:
                 WORKING_DIR: "/builds/worker"
diff --git a/taskcluster/ci/hazard/kind.yml b/taskcluster/kinds/hazard/kind.yml
index 8bdc1bbb17..495f6b10cc 100644
--- a/taskcluster/ci/hazard/kind.yml
+++ b/taskcluster/kinds/hazard/kind.yml
@@ -9,6 +9,7 @@ kind-dependencies:
 
 transforms:
     - gecko_taskgraph.transforms.build_attrs:transforms
+    - gecko_taskgraph.transforms.build_schedules:transforms
     - gecko_taskgraph.transforms.build_lints:transforms
     - gecko_taskgraph.transforms.job:transforms
     - gecko_taskgraph.transforms.task:transforms
diff --git a/taskcluster/ci/instrumented-build/kind.yml b/taskcluster/kinds/instrumented-build/kind.yml
index 9823970185..048bea725f 100644
--- a/taskcluster/ci/instrumented-build/kind.yml
+++ b/taskcluster/kinds/instrumented-build/kind.yml
@@ -11,6 +11,7 @@ kind-dependencies:
 transforms:
     - gecko_taskgraph.transforms.build:transforms
     - gecko_taskgraph.transforms.build_attrs:transforms
+    - gecko_taskgraph.transforms.build_schedules:transforms
     - gecko_taskgraph.transforms.build_lints:transforms
     - gecko_taskgraph.transforms.job:transforms
     - gecko_taskgraph.transforms.artifact:transforms
@@ -250,7 +251,6 @@ jobs:
         fetches:
             toolchain:
                 - android-gradle-dependencies
-                - android-gradle-python-envs
                 - android-ndk-linux
                 - android-sdk-linux
                 - linux64-jdk
@@ -306,7 +306,6 @@ jobs:
         fetches:
             toolchain:
                 - android-gradle-dependencies
-                - android-gradle-python-envs
                 - android-ndk-linux
                 - android-sdk-linux
                 - linux64-jdk
@@ -362,7 +361,6 @@ jobs:
         fetches:
             toolchain:
                 - android-gradle-dependencies
-                - android-gradle-python-envs
                 - android-ndk-linux
                 - android-sdk-linux
                 - linux64-jdk
diff --git a/taskcluster/ci/l10n-bump/kind.yml b/taskcluster/kinds/l10n-bump/kind.yml
index d40f9c48e9..d40f9c48e9 100644
--- a/taskcluster/ci/l10n-bump/kind.yml
+++ b/taskcluster/kinds/l10n-bump/kind.yml
diff --git a/taskcluster/ci/l10n-cross-channel/kind.yml b/taskcluster/kinds/l10n-cross-channel/kind.yml
index da30306599..da30306599 100644
--- a/taskcluster/ci/l10n-cross-channel/kind.yml
+++ b/taskcluster/kinds/l10n-cross-channel/kind.yml
diff --git a/taskcluster/ci/l10n/kind.yml b/taskcluster/kinds/l10n/kind.yml
index eeb0b2c54e..eeb0b2c54e 100644
--- a/taskcluster/ci/l10n/kind.yml
+++ b/taskcluster/kinds/l10n/kind.yml
diff --git a/taskcluster/ci/mar-signing-autograph-stage/kind.yml b/taskcluster/kinds/mar-signing-autograph-stage/kind.yml
index 711c28c44b..711c28c44b 100644
--- a/taskcluster/ci/mar-signing-autograph-stage/kind.yml
+++ b/taskcluster/kinds/mar-signing-autograph-stage/kind.yml
diff --git a/taskcluster/ci/mar-signing-l10n/kind.yml b/taskcluster/kinds/mar-signing-l10n/kind.yml
index ad470915ef..8016833c15 100644
--- a/taskcluster/ci/mar-signing-l10n/kind.yml
+++ b/taskcluster/kinds/mar-signing-l10n/kind.yml
@@ -16,6 +16,7 @@ kind-dependencies:
 only-for-build-platforms:
     - linux-shippable/opt
     - linux64-shippable/opt
+    - linux64-aarch64-shippable/opt
     - macosx64-shippable/opt
     - win32-shippable/opt
     - win64-shippable/opt
diff --git a/taskcluster/ci/mar-signing/kind.yml b/taskcluster/kinds/mar-signing/kind.yml
index e0feeaa0ff..e0feeaa0ff 100644
--- a/taskcluster/ci/mar-signing/kind.yml
+++ b/taskcluster/kinds/mar-signing/kind.yml
diff --git a/taskcluster/ci/maybe-release/kind.yml b/taskcluster/kinds/maybe-release/kind.yml
index 8664e52168..8664e52168 100644
--- a/taskcluster/ci/maybe-release/kind.yml
+++ b/taskcluster/kinds/maybe-release/kind.yml
diff --git a/taskcluster/ci/merge-automation/kind.yml b/taskcluster/kinds/merge-automation/kind.yml
index 8e2b34147e..8e2b34147e 100644
--- a/taskcluster/ci/merge-automation/kind.yml
+++ b/taskcluster/kinds/merge-automation/kind.yml
diff --git a/taskcluster/ci/openh264-plugin/kind.yml b/taskcluster/kinds/openh264-plugin/kind.yml
index e8459df438..e8459df438 100644
--- a/taskcluster/ci/openh264-plugin/kind.yml
+++ b/taskcluster/kinds/openh264-plugin/kind.yml
diff --git a/taskcluster/ci/openh264-signing/kind.yml b/taskcluster/kinds/openh264-signing/kind.yml
index e4dc174cc7..e4dc174cc7 100644
--- a/taskcluster/ci/openh264-signing/kind.yml
+++ b/taskcluster/kinds/openh264-signing/kind.yml
diff --git a/taskcluster/ci/packages/debian.yml b/taskcluster/kinds/packages/debian.yml
index 0a87ef6782..0a87ef6782 100644
--- a/taskcluster/ci/packages/debian.yml
+++ b/taskcluster/kinds/packages/debian.yml
diff --git a/taskcluster/ci/packages/kind.yml b/taskcluster/kinds/packages/kind.yml
index 5b21346de8..5b21346de8 100644
--- a/taskcluster/ci/packages/kind.yml
+++ b/taskcluster/kinds/packages/kind.yml
diff --git a/taskcluster/ci/packages/ubuntu.yml b/taskcluster/kinds/packages/ubuntu.yml
index d9bbd5f2ad..d9bbd5f2ad 100644
--- a/taskcluster/ci/packages/ubuntu.yml
+++ b/taskcluster/kinds/packages/ubuntu.yml
diff --git a/taskcluster/ci/partials-signing/kind.yml b/taskcluster/kinds/partials-signing/kind.yml
index 2c2bf0a9a0..2c2bf0a9a0 100644
--- a/taskcluster/ci/partials-signing/kind.yml
+++ b/taskcluster/kinds/partials-signing/kind.yml
diff --git a/taskcluster/ci/partials/kind.yml b/taskcluster/kinds/partials/kind.yml
index ea72198c5c..ea72198c5c 100644
--- a/taskcluster/ci/partials/kind.yml
+++ b/taskcluster/kinds/partials/kind.yml
diff --git a/taskcluster/ci/perftest/android.yml b/taskcluster/kinds/perftest/android.yml
index 1ed071a1a1..1ed071a1a1 100644
--- a/taskcluster/ci/perftest/android.yml
+++ b/taskcluster/kinds/perftest/android.yml
diff --git a/taskcluster/ci/perftest/kind.yml b/taskcluster/kinds/perftest/kind.yml
index 8a92fe55b2..8a92fe55b2 100644
--- a/taskcluster/ci/perftest/kind.yml
+++ b/taskcluster/kinds/perftest/kind.yml
diff --git a/taskcluster/ci/perftest/linux.yml b/taskcluster/kinds/perftest/linux.yml
index 1016469fb8..1016469fb8 100644
--- a/taskcluster/ci/perftest/linux.yml
+++ b/taskcluster/kinds/perftest/linux.yml
diff --git a/taskcluster/ci/perftest/macosx.yml b/taskcluster/kinds/perftest/macosx.yml
index d98f7524b8..d98f7524b8 100644
--- a/taskcluster/ci/perftest/macosx.yml
+++ b/taskcluster/kinds/perftest/macosx.yml
diff --git a/taskcluster/ci/perftest/windows.yml b/taskcluster/kinds/perftest/windows.yml
index 3e027e5741..3e027e5741 100644
--- a/taskcluster/ci/perftest/windows.yml
+++ b/taskcluster/kinds/perftest/windows.yml
diff --git a/taskcluster/ci/post-balrog-dummy/kind.yml b/taskcluster/kinds/post-balrog-dummy/kind.yml
index e1a9849bbc..e1a9849bbc 100644
--- a/taskcluster/ci/post-balrog-dummy/kind.yml
+++ b/taskcluster/kinds/post-balrog-dummy/kind.yml
diff --git a/taskcluster/ci/post-beetmover-checksums-dummy/kind.yml b/taskcluster/kinds/post-beetmover-checksums-dummy/kind.yml
index 40ff97dce8..40ff97dce8 100644
--- a/taskcluster/ci/post-beetmover-checksums-dummy/kind.yml
+++ b/taskcluster/kinds/post-beetmover-checksums-dummy/kind.yml
diff --git a/taskcluster/ci/post-beetmover-components-dummy/kind.yml b/taskcluster/kinds/post-beetmover-components-dummy/kind.yml
index bf8d98a83c..bf8d98a83c 100644
--- a/taskcluster/ci/post-beetmover-components-dummy/kind.yml
+++ b/taskcluster/kinds/post-beetmover-components-dummy/kind.yml
diff --git a/taskcluster/ci/post-beetmover-dummy/kind.yml b/taskcluster/kinds/post-beetmover-dummy/kind.yml
index e5d50ce256..e5d50ce256 100644
--- a/taskcluster/ci/post-beetmover-dummy/kind.yml
+++ b/taskcluster/kinds/post-beetmover-dummy/kind.yml
diff --git a/taskcluster/ci/post-langpack-dummy/kind.yml b/taskcluster/kinds/post-langpack-dummy/kind.yml
index 95fe9f7684..95fe9f7684 100644
--- a/taskcluster/ci/post-langpack-dummy/kind.yml
+++ b/taskcluster/kinds/post-langpack-dummy/kind.yml
diff --git a/taskcluster/ci/post-signing/kind.yml b/taskcluster/kinds/post-signing/kind.yml
index b07436b619..b07436b619 100644
--- a/taskcluster/ci/post-signing/kind.yml
+++ b/taskcluster/kinds/post-signing/kind.yml
diff --git a/taskcluster/ci/post-update-verify-dummy/kind.yml b/taskcluster/kinds/post-update-verify-dummy/kind.yml
index 6d7bfb3515..6d7bfb3515 100644
--- a/taskcluster/ci/post-update-verify-dummy/kind.yml
+++ b/taskcluster/kinds/post-update-verify-dummy/kind.yml
diff --git a/taskcluster/ci/push-bundle/kind.yml b/taskcluster/kinds/push-bundle/kind.yml
index 2c48a14177..2c48a14177 100644
--- a/taskcluster/ci/push-bundle/kind.yml
+++ b/taskcluster/kinds/push-bundle/kind.yml
diff --git a/taskcluster/ci/release-balrog-scheduling/kind.yml b/taskcluster/kinds/release-balrog-scheduling/kind.yml
index 64bd751ca3..64bd751ca3 100644
--- a/taskcluster/ci/release-balrog-scheduling/kind.yml
+++ b/taskcluster/kinds/release-balrog-scheduling/kind.yml
diff --git a/taskcluster/ci/release-balrog-submit-toplevel/kind.yml b/taskcluster/kinds/release-balrog-submit-toplevel/kind.yml
index dc1155df9d..dc1155df9d 100644
--- a/taskcluster/ci/release-balrog-submit-toplevel/kind.yml
+++ b/taskcluster/kinds/release-balrog-submit-toplevel/kind.yml
diff --git a/taskcluster/ci/release-beetmover-push-to-release/kind.yml b/taskcluster/kinds/release-beetmover-push-to-release/kind.yml
index affc0f2c77..affc0f2c77 100644
--- a/taskcluster/ci/release-beetmover-push-to-release/kind.yml
+++ b/taskcluster/kinds/release-beetmover-push-to-release/kind.yml
diff --git a/taskcluster/ci/release-beetmover-signed-langpacks-checksums/kind.yml b/taskcluster/kinds/release-beetmover-signed-langpacks-checksums/kind.yml
index 473f711a2a..473f711a2a 100644
--- a/taskcluster/ci/release-beetmover-signed-langpacks-checksums/kind.yml
+++ b/taskcluster/kinds/release-beetmover-signed-langpacks-checksums/kind.yml
diff --git a/taskcluster/ci/release-beetmover-signed-langpacks/kind.yml b/taskcluster/kinds/release-beetmover-signed-langpacks/kind.yml
index 63bdcfe921..744198c466 100644
--- a/taskcluster/ci/release-beetmover-signed-langpacks/kind.yml
+++ b/taskcluster/kinds/release-beetmover-signed-langpacks/kind.yml
@@ -27,10 +27,7 @@ jobs:
         description: Beetmover submission for platform-independent langpacks {locales} in {platform} directory
         from-deps:
             group-by: single-with-filters
-        worker-type:
-            by-release-level:
-                production: scriptworker-k8s/gecko-3-beetmover
-                staging: scriptworker-k8s/gecko-1-beetmover
+        worker-type: beetmover
         run-on-projects: []
         shipping-phase: promote
         attributes:
diff --git a/taskcluster/ci/release-beetmover-source-checksums/kind.yml b/taskcluster/kinds/release-beetmover-source-checksums/kind.yml
index d7a5bf828f..d7a5bf828f 100644
--- a/taskcluster/ci/release-beetmover-source-checksums/kind.yml
+++ b/taskcluster/kinds/release-beetmover-source-checksums/kind.yml
diff --git a/taskcluster/ci/release-bouncer-aliases/kind.yml b/taskcluster/kinds/release-bouncer-aliases/kind.yml
index d1ce834c48..d1ce834c48 100644
--- a/taskcluster/ci/release-bouncer-aliases/kind.yml
+++ b/taskcluster/kinds/release-bouncer-aliases/kind.yml
diff --git a/taskcluster/ci/release-bouncer-check/kind.yml b/taskcluster/kinds/release-bouncer-check/kind.yml
index 7b7133ffd5..7b7133ffd5 100644
--- a/taskcluster/ci/release-bouncer-check/kind.yml
+++ b/taskcluster/kinds/release-bouncer-check/kind.yml
diff --git a/taskcluster/ci/release-bouncer-sub/kind.yml b/taskcluster/kinds/release-bouncer-sub/kind.yml
index 131b41b0a7..131b41b0a7 100644
--- a/taskcluster/ci/release-bouncer-sub/kind.yml
+++ b/taskcluster/kinds/release-bouncer-sub/kind.yml
diff --git a/taskcluster/ci/release-early-tagging/kind.yml b/taskcluster/kinds/release-early-tagging/kind.yml
index 775bb4ed7e..775bb4ed7e 100644
--- a/taskcluster/ci/release-early-tagging/kind.yml
+++ b/taskcluster/kinds/release-early-tagging/kind.yml
diff --git a/taskcluster/ci/release-eme-free-repack-beetmover-checksums/kind.yml b/taskcluster/kinds/release-eme-free-repack-beetmover-checksums/kind.yml
index c75a85ac54..c75a85ac54 100644
--- a/taskcluster/ci/release-eme-free-repack-beetmover-checksums/kind.yml
+++ b/taskcluster/kinds/release-eme-free-repack-beetmover-checksums/kind.yml
diff --git a/taskcluster/ci/release-eme-free-repack-beetmover/kind.yml b/taskcluster/kinds/release-eme-free-repack-beetmover/kind.yml
index 7a33d0fb69..7a33d0fb69 100644
--- a/taskcluster/ci/release-eme-free-repack-beetmover/kind.yml
+++ b/taskcluster/kinds/release-eme-free-repack-beetmover/kind.yml
diff --git a/taskcluster/ci/release-eme-free-repack-mac-notarization/kind.yml b/taskcluster/kinds/release-eme-free-repack-mac-notarization/kind.yml
index ff04daf61d..ff04daf61d 100644
--- a/taskcluster/ci/release-eme-free-repack-mac-notarization/kind.yml
+++ b/taskcluster/kinds/release-eme-free-repack-mac-notarization/kind.yml
diff --git a/taskcluster/ci/release-eme-free-repack-mac-signing/kind.yml b/taskcluster/kinds/release-eme-free-repack-mac-signing/kind.yml
index 84d0e17dd1..84d0e17dd1 100644
--- a/taskcluster/ci/release-eme-free-repack-mac-signing/kind.yml
+++ b/taskcluster/kinds/release-eme-free-repack-mac-signing/kind.yml
diff --git a/taskcluster/ci/release-eme-free-repack-repackage-signing/kind.yml b/taskcluster/kinds/release-eme-free-repack-repackage-signing/kind.yml
index c369761202..c369761202 100644
--- a/taskcluster/ci/release-eme-free-repack-repackage-signing/kind.yml
+++ b/taskcluster/kinds/release-eme-free-repack-repackage-signing/kind.yml
diff --git a/taskcluster/ci/release-eme-free-repack-repackage/kind.yml b/taskcluster/kinds/release-eme-free-repack-repackage/kind.yml
index 78bc18fe6d..78bc18fe6d 100644
--- a/taskcluster/ci/release-eme-free-repack-repackage/kind.yml
+++ b/taskcluster/kinds/release-eme-free-repack-repackage/kind.yml
diff --git a/taskcluster/ci/release-eme-free-repack/kind.yml b/taskcluster/kinds/release-eme-free-repack/kind.yml
index cc3e85071b..cc3e85071b 100644
--- a/taskcluster/ci/release-eme-free-repack/kind.yml
+++ b/taskcluster/kinds/release-eme-free-repack/kind.yml
diff --git a/taskcluster/ci/release-final-verify/kind.yml b/taskcluster/kinds/release-final-verify/kind.yml
index b1319665cd..b1319665cd 100644
--- a/taskcluster/ci/release-final-verify/kind.yml
+++ b/taskcluster/kinds/release-final-verify/kind.yml
diff --git a/taskcluster/ci/release-flatpak-push/kind.yml b/taskcluster/kinds/release-flatpak-push/kind.yml
index 27f5ebf3ec..94e0e42c16 100644
--- a/taskcluster/ci/release-flatpak-push/kind.yml
+++ b/taskcluster/kinds/release-flatpak-push/kind.yml
@@ -22,10 +22,7 @@ job-defaults:
         platform: linux64/opt
         kind: build
         tier: 2
-    worker-type:
-        by-release-level:
-            production: scriptworker-k8s/gecko-3-pushflatpak
-            staging: scriptworker-k8s/gecko-1-pushflatpak
+    worker-type: pushflatpak
     worker:
         implementation: push-flatpak
         channel:
diff --git a/taskcluster/ci/release-flatpak-repackage/kind.yml b/taskcluster/kinds/release-flatpak-repackage/kind.yml
index ecc86bf4ab..ecc86bf4ab 100644
--- a/taskcluster/ci/release-flatpak-repackage/kind.yml
+++ b/taskcluster/kinds/release-flatpak-repackage/kind.yml
diff --git a/taskcluster/ci/release-generate-checksums-beetmover/kind.yml b/taskcluster/kinds/release-generate-checksums-beetmover/kind.yml
index ca998ea2f2..ca998ea2f2 100644
--- a/taskcluster/ci/release-generate-checksums-beetmover/kind.yml
+++ b/taskcluster/kinds/release-generate-checksums-beetmover/kind.yml
diff --git a/taskcluster/ci/release-generate-checksums-signing/kind.yml b/taskcluster/kinds/release-generate-checksums-signing/kind.yml
index a86b4c8dc5..a86b4c8dc5 100644
--- a/taskcluster/ci/release-generate-checksums-signing/kind.yml
+++ b/taskcluster/kinds/release-generate-checksums-signing/kind.yml
diff --git a/taskcluster/ci/release-generate-checksums/kind.yml b/taskcluster/kinds/release-generate-checksums/kind.yml
index 71018c8cef..71018c8cef 100644
--- a/taskcluster/ci/release-generate-checksums/kind.yml
+++ b/taskcluster/kinds/release-generate-checksums/kind.yml
diff --git a/taskcluster/ci/release-mark-as-shipped/kind.yml b/taskcluster/kinds/release-mark-as-shipped/kind.yml
index 05faa3f88e..05faa3f88e 100644
--- a/taskcluster/ci/release-mark-as-shipped/kind.yml
+++ b/taskcluster/kinds/release-mark-as-shipped/kind.yml
diff --git a/taskcluster/ci/release-msix-push/kind.yml b/taskcluster/kinds/release-msix-push/kind.yml
index 3009c74df2..39de997bef 100644
--- a/taskcluster/ci/release-msix-push/kind.yml
+++ b/taskcluster/kinds/release-msix-push/kind.yml
@@ -22,10 +22,7 @@ job-defaults:
         platform: win32-shippable/opt
         kind: build
         tier: 2
-    worker-type:
-        by-release-level:
-            production: scriptworker-k8s/gecko-3-pushmsix
-            staging: scriptworker-k8s/gecko-1-pushmsix
+    worker-type: pushmsix
     worker:
         implementation: push-msix
         channel:
diff --git a/taskcluster/ci/release-notify-av-announce/kind.yml b/taskcluster/kinds/release-notify-av-announce/kind.yml
index 45a0e5db53..45a0e5db53 100644
--- a/taskcluster/ci/release-notify-av-announce/kind.yml
+++ b/taskcluster/kinds/release-notify-av-announce/kind.yml
diff --git a/taskcluster/ci/release-notify-promote/kind.yml b/taskcluster/kinds/release-notify-promote/kind.yml
index bc53da5a49..bc53da5a49 100644
--- a/taskcluster/ci/release-notify-promote/kind.yml
+++ b/taskcluster/kinds/release-notify-promote/kind.yml
diff --git a/taskcluster/ci/release-notify-push/kind.yml b/taskcluster/kinds/release-notify-push/kind.yml
index be1a7b5be8..be1a7b5be8 100644
--- a/taskcluster/ci/release-notify-push/kind.yml
+++ b/taskcluster/kinds/release-notify-push/kind.yml
diff --git a/taskcluster/ci/release-notify-ship/kind.yml b/taskcluster/kinds/release-notify-ship/kind.yml
index fe3eced6e7..fe3eced6e7 100644
--- a/taskcluster/ci/release-notify-ship/kind.yml
+++ b/taskcluster/kinds/release-notify-ship/kind.yml
diff --git a/taskcluster/ci/release-notify-started/kind.yml b/taskcluster/kinds/release-notify-started/kind.yml
index 929c07ec59..929c07ec59 100644
--- a/taskcluster/ci/release-notify-started/kind.yml
+++ b/taskcluster/kinds/release-notify-started/kind.yml
diff --git a/taskcluster/ci/release-notify-testrail/kind.yml b/taskcluster/kinds/release-notify-testrail/kind.yml
index 5e4fa41307..5e4fa41307 100644
--- a/taskcluster/ci/release-notify-testrail/kind.yml
+++ b/taskcluster/kinds/release-notify-testrail/kind.yml
diff --git a/taskcluster/ci/release-partner-attribution-beetmover/kind.yml b/taskcluster/kinds/release-partner-attribution-beetmover/kind.yml
index 2851ff7d37..2851ff7d37 100644
--- a/taskcluster/ci/release-partner-attribution-beetmover/kind.yml
+++ b/taskcluster/kinds/release-partner-attribution-beetmover/kind.yml
diff --git a/taskcluster/ci/release-partner-attribution/kind.yml b/taskcluster/kinds/release-partner-attribution/kind.yml
index 1da2656150..1da2656150 100644
--- a/taskcluster/ci/release-partner-attribution/kind.yml
+++ b/taskcluster/kinds/release-partner-attribution/kind.yml
diff --git a/taskcluster/ci/release-partner-repack-beetmover/kind.yml b/taskcluster/kinds/release-partner-repack-beetmover/kind.yml
index 164446f683..164446f683 100644
--- a/taskcluster/ci/release-partner-repack-beetmover/kind.yml
+++ b/taskcluster/kinds/release-partner-repack-beetmover/kind.yml
diff --git a/taskcluster/ci/release-partner-repack-bouncer-sub/kind.yml b/taskcluster/kinds/release-partner-repack-bouncer-sub/kind.yml
index 98fa149810..98fa149810 100644
--- a/taskcluster/ci/release-partner-repack-bouncer-sub/kind.yml
+++ b/taskcluster/kinds/release-partner-repack-bouncer-sub/kind.yml
diff --git a/taskcluster/ci/release-partner-repack-chunking-dummy/kind.yml b/taskcluster/kinds/release-partner-repack-chunking-dummy/kind.yml
index 4975931312..4975931312 100644
--- a/taskcluster/ci/release-partner-repack-chunking-dummy/kind.yml
+++ b/taskcluster/kinds/release-partner-repack-chunking-dummy/kind.yml
diff --git a/taskcluster/ci/release-partner-repack-mac-notarization/kind.yml b/taskcluster/kinds/release-partner-repack-mac-notarization/kind.yml
index ee7a78e54f..ee7a78e54f 100644
--- a/taskcluster/ci/release-partner-repack-mac-notarization/kind.yml
+++ b/taskcluster/kinds/release-partner-repack-mac-notarization/kind.yml
diff --git a/taskcluster/ci/release-partner-repack-mac-signing/kind.yml b/taskcluster/kinds/release-partner-repack-mac-signing/kind.yml
index dec5189979..dec5189979 100644
--- a/taskcluster/ci/release-partner-repack-mac-signing/kind.yml
+++ b/taskcluster/kinds/release-partner-repack-mac-signing/kind.yml
diff --git a/taskcluster/ci/release-partner-repack-repackage-signing/kind.yml b/taskcluster/kinds/release-partner-repack-repackage-signing/kind.yml
index 2242023f91..2242023f91 100644
--- a/taskcluster/ci/release-partner-repack-repackage-signing/kind.yml
+++ b/taskcluster/kinds/release-partner-repack-repackage-signing/kind.yml
diff --git a/taskcluster/ci/release-partner-repack-repackage/kind.yml b/taskcluster/kinds/release-partner-repack-repackage/kind.yml
index 099c55240f..099c55240f 100644
--- a/taskcluster/ci/release-partner-repack-repackage/kind.yml
+++ b/taskcluster/kinds/release-partner-repack-repackage/kind.yml
diff --git a/taskcluster/ci/release-partner-repack/kind.yml b/taskcluster/kinds/release-partner-repack/kind.yml
index 2a5d2fc996..2a5d2fc996 100644
--- a/taskcluster/ci/release-partner-repack/kind.yml
+++ b/taskcluster/kinds/release-partner-repack/kind.yml
diff --git a/taskcluster/ci/release-push-langpacks/kind.yml b/taskcluster/kinds/release-push-langpacks/kind.yml
index fbc5bcc8a9..fbc5bcc8a9 100644
--- a/taskcluster/ci/release-push-langpacks/kind.yml
+++ b/taskcluster/kinds/release-push-langpacks/kind.yml
diff --git a/taskcluster/ci/release-secondary-balrog-scheduling/kind.yml b/taskcluster/kinds/release-secondary-balrog-scheduling/kind.yml
index 9a230639b9..9a230639b9 100644
--- a/taskcluster/ci/release-secondary-balrog-scheduling/kind.yml
+++ b/taskcluster/kinds/release-secondary-balrog-scheduling/kind.yml
diff --git a/taskcluster/ci/release-secondary-balrog-submit-toplevel/kind.yml b/taskcluster/kinds/release-secondary-balrog-submit-toplevel/kind.yml
index d742b4fb61..d742b4fb61 100644
--- a/taskcluster/ci/release-secondary-balrog-submit-toplevel/kind.yml
+++ b/taskcluster/kinds/release-secondary-balrog-submit-toplevel/kind.yml
diff --git a/taskcluster/ci/release-secondary-final-verify/kind.yml b/taskcluster/kinds/release-secondary-final-verify/kind.yml
index 0d2e58d01d..0d2e58d01d 100644
--- a/taskcluster/ci/release-secondary-final-verify/kind.yml
+++ b/taskcluster/kinds/release-secondary-final-verify/kind.yml
diff --git a/taskcluster/ci/release-secondary-flatpak-push/kind.yml b/taskcluster/kinds/release-secondary-flatpak-push/kind.yml
index 7f770d4ee5..0f915d8d26 100644
--- a/taskcluster/ci/release-secondary-flatpak-push/kind.yml
+++ b/taskcluster/kinds/release-secondary-flatpak-push/kind.yml
@@ -22,10 +22,7 @@ job-defaults:
         platform: linux64/opt
         kind: build
         tier: 2
-    worker-type:
-        by-release-level:
-            production: scriptworker-k8s/gecko-3-pushflatpak
-            staging: scriptworker-k8s/gecko-1-pushflatpak
+    worker-type: pushflatpak
     worker:
         implementation: push-flatpak
         channel: beta
diff --git a/taskcluster/ci/release-secondary-notify-ship/kind.yml b/taskcluster/kinds/release-secondary-notify-ship/kind.yml
index ab9b20ed62..ab9b20ed62 100644
--- a/taskcluster/ci/release-secondary-notify-ship/kind.yml
+++ b/taskcluster/kinds/release-secondary-notify-ship/kind.yml
diff --git a/taskcluster/ci/release-secondary-update-verify-config/kind.yml b/taskcluster/kinds/release-secondary-update-verify-config/kind.yml
index 7e28131a5e..7e28131a5e 100644
--- a/taskcluster/ci/release-secondary-update-verify-config/kind.yml
+++ b/taskcluster/kinds/release-secondary-update-verify-config/kind.yml
diff --git a/taskcluster/ci/release-secondary-update-verify/kind.yml b/taskcluster/kinds/release-secondary-update-verify/kind.yml
index f567cf7ae3..f567cf7ae3 100644
--- a/taskcluster/ci/release-secondary-update-verify/kind.yml
+++ b/taskcluster/kinds/release-secondary-update-verify/kind.yml
diff --git a/taskcluster/ci/release-snap-repackage/kind.yml b/taskcluster/kinds/release-snap-repackage/kind.yml
index 73d9d8a410..73d9d8a410 100644
--- a/taskcluster/ci/release-snap-repackage/kind.yml
+++ b/taskcluster/kinds/release-snap-repackage/kind.yml
diff --git a/taskcluster/ci/release-source-checksums-signing/kind.yml b/taskcluster/kinds/release-source-checksums-signing/kind.yml
index de9f98acc0..de9f98acc0 100644
--- a/taskcluster/ci/release-source-checksums-signing/kind.yml
+++ b/taskcluster/kinds/release-source-checksums-signing/kind.yml
diff --git a/taskcluster/ci/release-source-signing/kind.yml b/taskcluster/kinds/release-source-signing/kind.yml
index 9ab9e37d88..9ab9e37d88 100644
--- a/taskcluster/ci/release-source-signing/kind.yml
+++ b/taskcluster/kinds/release-source-signing/kind.yml
diff --git a/taskcluster/ci/release-source/kind.yml b/taskcluster/kinds/release-source/kind.yml
index 6b550e9d7e..ff2ee375f7 100644
--- a/taskcluster/ci/release-source/kind.yml
+++ b/taskcluster/kinds/release-source/kind.yml
@@ -35,9 +35,6 @@ job-defaults:
         options: []
         tooltool-downloads: public
     run-on-projects: []
-    # The build_attrs transform defaults to setting a `skip-unlles-schedules'
-    # optimization based on the task label. The tasks here don't have corresponding
-    # schedules defined in mozbuild.
     optimization: null
 
 jobs:
diff --git a/taskcluster/ci/release-update-verify-config-next/kind.yml b/taskcluster/kinds/release-update-verify-config-next/kind.yml
index 959d0afb9a..959d0afb9a 100644
--- a/taskcluster/ci/release-update-verify-config-next/kind.yml
+++ b/taskcluster/kinds/release-update-verify-config-next/kind.yml
diff --git a/taskcluster/ci/release-update-verify-config/kind.yml b/taskcluster/kinds/release-update-verify-config/kind.yml
index d4e40cda12..d4e40cda12 100644
--- a/taskcluster/ci/release-update-verify-config/kind.yml
+++ b/taskcluster/kinds/release-update-verify-config/kind.yml
diff --git a/taskcluster/ci/release-update-verify-next/kind.yml b/taskcluster/kinds/release-update-verify-next/kind.yml
index ad72e9b118..ad72e9b118 100644
--- a/taskcluster/ci/release-update-verify-next/kind.yml
+++ b/taskcluster/kinds/release-update-verify-next/kind.yml
diff --git a/taskcluster/ci/release-update-verify/kind.yml b/taskcluster/kinds/release-update-verify/kind.yml
index ec7f9874da..ec7f9874da 100644
--- a/taskcluster/ci/release-update-verify/kind.yml
+++ b/taskcluster/kinds/release-update-verify/kind.yml
diff --git a/taskcluster/ci/release-version-bump/kind.yml b/taskcluster/kinds/release-version-bump/kind.yml
index 114d52df95..114d52df95 100644
--- a/taskcluster/ci/release-version-bump/kind.yml
+++ b/taskcluster/kinds/release-version-bump/kind.yml
diff --git a/taskcluster/ci/repackage-deb-l10n/kind.yml b/taskcluster/kinds/repackage-deb-l10n/kind.yml
index a22e50787a..a22e50787a 100644
--- a/taskcluster/ci/repackage-deb-l10n/kind.yml
+++ b/taskcluster/kinds/repackage-deb-l10n/kind.yml
diff --git a/taskcluster/ci/repackage-deb/kind.yml b/taskcluster/kinds/repackage-deb/kind.yml
index aa6381bb4a..779aaf2659 100644
--- a/taskcluster/ci/repackage-deb/kind.yml
+++ b/taskcluster/kinds/repackage-deb/kind.yml
@@ -21,6 +21,7 @@ only-for-build-platforms:
     - linux-devedition/opt
     - linux64-shippable/opt
     - linux64-devedition/opt
+    - linux64-aarch64-shippable/opt
 
 only-for-attributes:
     - nightly
diff --git a/taskcluster/ci/repackage-l10n/kind.yml b/taskcluster/kinds/repackage-l10n/kind.yml
index c78b52de2b..8be0cb19cc 100644
--- a/taskcluster/ci/repackage-l10n/kind.yml
+++ b/taskcluster/kinds/repackage-l10n/kind.yml
@@ -22,6 +22,7 @@ kind-dependencies:
 only-for-build-platforms:
     - linux-shippable/opt
     - linux64-shippable/opt
+    - linux64-aarch64-shippable/opt
     - macosx64-shippable/opt
     - win32-shippable/opt
     - win64-shippable/opt
diff --git a/taskcluster/ci/repackage-msi/kind.yml b/taskcluster/kinds/repackage-msi/kind.yml
index fa2fb3ada3..fa2fb3ada3 100644
--- a/taskcluster/ci/repackage-msi/kind.yml
+++ b/taskcluster/kinds/repackage-msi/kind.yml
diff --git a/taskcluster/ci/repackage-msix/kind.yml b/taskcluster/kinds/repackage-msix/kind.yml
index 96ff07c77c..96ff07c77c 100644
--- a/taskcluster/ci/repackage-msix/kind.yml
+++ b/taskcluster/kinds/repackage-msix/kind.yml
diff --git a/taskcluster/ci/repackage-shippable-l10n-msix/kind.yml b/taskcluster/kinds/repackage-shippable-l10n-msix/kind.yml
index 021896a7ad..021896a7ad 100644
--- a/taskcluster/ci/repackage-shippable-l10n-msix/kind.yml
+++ b/taskcluster/kinds/repackage-shippable-l10n-msix/kind.yml
diff --git a/taskcluster/ci/repackage-signing-l10n/kind.yml b/taskcluster/kinds/repackage-signing-l10n/kind.yml
index 9d274b1ee3..9d274b1ee3 100644
--- a/taskcluster/ci/repackage-signing-l10n/kind.yml
+++ b/taskcluster/kinds/repackage-signing-l10n/kind.yml
diff --git a/taskcluster/ci/repackage-signing-msi/kind.yml b/taskcluster/kinds/repackage-signing-msi/kind.yml
index 8a6691413a..8a6691413a 100644
--- a/taskcluster/ci/repackage-signing-msi/kind.yml
+++ b/taskcluster/kinds/repackage-signing-msi/kind.yml
diff --git a/taskcluster/ci/repackage-signing-msix/kind.yml b/taskcluster/kinds/repackage-signing-msix/kind.yml
index 4976f08366..4976f08366 100644
--- a/taskcluster/ci/repackage-signing-msix/kind.yml
+++ b/taskcluster/kinds/repackage-signing-msix/kind.yml
diff --git a/taskcluster/ci/repackage-signing-shippable-l10n-msix/kind.yml b/taskcluster/kinds/repackage-signing-shippable-l10n-msix/kind.yml
index 0f6f7787ee..0f6f7787ee 100644
--- a/taskcluster/ci/repackage-signing-shippable-l10n-msix/kind.yml
+++ b/taskcluster/kinds/repackage-signing-shippable-l10n-msix/kind.yml
diff --git a/taskcluster/ci/repackage-signing/kind.yml b/taskcluster/kinds/repackage-signing/kind.yml
index 49ea244a9e..49ea244a9e 100644
--- a/taskcluster/ci/repackage-signing/kind.yml
+++ b/taskcluster/kinds/repackage-signing/kind.yml
diff --git a/taskcluster/ci/repackage/kind.yml b/taskcluster/kinds/repackage/kind.yml
index b9f94f4a89..b9f94f4a89 100644
--- a/taskcluster/ci/repackage/kind.yml
+++ b/taskcluster/kinds/repackage/kind.yml
diff --git a/taskcluster/ci/repo-update/kind.yml b/taskcluster/kinds/repo-update/kind.yml
index 50c7c0ac0e..50c7c0ac0e 100644
--- a/taskcluster/ci/repo-update/kind.yml
+++ b/taskcluster/kinds/repo-update/kind.yml
diff --git a/taskcluster/ci/scriptworker-canary/kind.yml b/taskcluster/kinds/scriptworker-canary/kind.yml
index a1ee225b89..a1ee225b89 100644
--- a/taskcluster/ci/scriptworker-canary/kind.yml
+++ b/taskcluster/kinds/scriptworker-canary/kind.yml
diff --git a/taskcluster/ci/searchfox/kind.yml b/taskcluster/kinds/searchfox/kind.yml
index 492cba940d..4ea3203d9f 100644
--- a/taskcluster/ci/searchfox/kind.yml
+++ b/taskcluster/kinds/searchfox/kind.yml
@@ -209,7 +209,6 @@ jobs:
         fetches:
             toolchain:
                 - android-gradle-dependencies
-                - android-gradle-python-envs
                 - android-ndk-linux
                 - android-sdk-linux
                 - linux64-jdk
diff --git a/taskcluster/ci/sentry/kind.yml b/taskcluster/kinds/sentry/kind.yml
index bfc3cf07a2..bfc3cf07a2 100644
--- a/taskcluster/ci/sentry/kind.yml
+++ b/taskcluster/kinds/sentry/kind.yml
diff --git a/taskcluster/ci/shippable-l10n-mac-notarization/kind.yml b/taskcluster/kinds/shippable-l10n-mac-notarization/kind.yml
index 461eac91ac..461eac91ac 100644
--- a/taskcluster/ci/shippable-l10n-mac-notarization/kind.yml
+++ b/taskcluster/kinds/shippable-l10n-mac-notarization/kind.yml
diff --git a/taskcluster/ci/shippable-l10n-mac-signing/kind.yml b/taskcluster/kinds/shippable-l10n-mac-signing/kind.yml
index 21fe44b4f0..21fe44b4f0 100644
--- a/taskcluster/ci/shippable-l10n-mac-signing/kind.yml
+++ b/taskcluster/kinds/shippable-l10n-mac-signing/kind.yml
diff --git a/taskcluster/ci/shippable-l10n-signing/kind.yml b/taskcluster/kinds/shippable-l10n-signing/kind.yml
index fdb545381f..fdb545381f 100644
--- a/taskcluster/ci/shippable-l10n-signing/kind.yml
+++ b/taskcluster/kinds/shippable-l10n-signing/kind.yml
diff --git a/taskcluster/ci/shippable-l10n/kind.yml b/taskcluster/kinds/shippable-l10n/kind.yml
index d38edb2ee5..ddd6c25401 100644
--- a/taskcluster/ci/shippable-l10n/kind.yml
+++ b/taskcluster/kinds/shippable-l10n/kind.yml
@@ -20,6 +20,7 @@ kind-dependencies:
 only-for-build-platforms:
     - linux64-shippable/opt
     - linux-shippable/opt
+    - linux64-aarch64-shippable/opt
     - macosx64-shippable/opt
     - win32-shippable/opt
     - win64-shippable/opt
@@ -76,6 +77,7 @@ jobs:
                 by-build-platform:
                     linux-shippable: linux-opt
                     linux64-shippable: linux64-opt
+                    linux64-aarch64-shippable: linux64-aarch64-opt
                     macosx64-shippable: macosx64-opt
                     win32-shippable: win32-opt
                     win64-shippable: win64-opt
@@ -93,6 +95,7 @@ jobs:
             platform:
                 by-build-platform:
                     linux64-shippable: linux64-shippable/opt
+                    linux64-aarch64-shippable: linux64-aarch64-shippable/opt
                     linux-shippable: linux32-shippable/opt
                     macosx64-shippable: osx-shippable/opt
                     win32-shippable: windows2012-32-shippable/opt
@@ -133,6 +136,12 @@ jobs:
                         - single_locale/tc_common.py
                         - single_locale/tc_linux_common.py
                         - taskcluster_nightly.py
+                    linux64-aarch64-shippable:
+                        - single_locale/firefox.py
+                        - single_locale/linux64.py
+                        - single_locale/tc_common.py
+                        - single_locale/tc_linux_common.py
+                        - taskcluster_nightly.py
                     macosx64-shippable:
                         - single_locale/firefox.py
                         - single_locale/macosx64.py
diff --git a/taskcluster/ci/signing-apk/kind.yml b/taskcluster/kinds/signing-apk/kind.yml
index 85b2f21bfd..85b2f21bfd 100644
--- a/taskcluster/ci/signing-apk/kind.yml
+++ b/taskcluster/kinds/signing-apk/kind.yml
diff --git a/taskcluster/ci/signing-bundle/kind.yml b/taskcluster/kinds/signing-bundle/kind.yml
index e062282fd6..e062282fd6 100644
--- a/taskcluster/ci/signing-bundle/kind.yml
+++ b/taskcluster/kinds/signing-bundle/kind.yml
diff --git a/taskcluster/ci/signing/kind.yml b/taskcluster/kinds/signing/kind.yml
index 655750438c..655750438c 100644
--- a/taskcluster/ci/signing/kind.yml
+++ b/taskcluster/kinds/signing/kind.yml
diff --git a/taskcluster/ci/snap-upstream-build/kind.yml b/taskcluster/kinds/snap-upstream-build/kind.yml
index 7016989ba8..7016989ba8 100644
--- a/taskcluster/ci/snap-upstream-build/kind.yml
+++ b/taskcluster/kinds/snap-upstream-build/kind.yml
diff --git a/taskcluster/ci/snap-upstream-test/kind.yml b/taskcluster/kinds/snap-upstream-test/kind.yml
index 585a1fca1f..585a1fca1f 100644
--- a/taskcluster/ci/snap-upstream-test/kind.yml
+++ b/taskcluster/kinds/snap-upstream-test/kind.yml
diff --git a/taskcluster/ci/source-test/android-compare-locales.yml b/taskcluster/kinds/source-test/android-compare-locales.yml
index 6423ad708d..6423ad708d 100644
--- a/taskcluster/ci/source-test/android-compare-locales.yml
+++ b/taskcluster/kinds/source-test/android-compare-locales.yml
diff --git a/taskcluster/ci/source-test/android-detekt.yml b/taskcluster/kinds/source-test/android-detekt.yml
index 84f46ed6b7..c39ebca218 100644
--- a/taskcluster/ci/source-test/android-detekt.yml
+++ b/taskcluster/kinds/source-test/android-detekt.yml
@@ -11,8 +11,6 @@ job-defaults:
     worker:
         docker-image: {in-tree: lint}
         max-run-time: 1200
-        env:
-            JAVA_HOME: "/builds/worker/fetches/jdk/jdk-17.0.6+10"
     attributes:
         code-review: true
     always-target: true
@@ -20,7 +18,6 @@ job-defaults:
         toolchain:
             - android-sdk-linux
             - android-gradle-dependencies
-            - android-gradle-python-envs
             - linux64-jdk-repack
     platform: 'lint/opt'
     treeherder:
diff --git a/taskcluster/ci/source-test/android-lint.yml b/taskcluster/kinds/source-test/android-lint.yml
index c7eb456021..8cbbcc3385 100644
--- a/taskcluster/ci/source-test/android-lint.yml
+++ b/taskcluster/kinds/source-test/android-lint.yml
@@ -10,11 +10,10 @@ job-defaults:
         use-caches: false
     worker:
         max-run-time: 2700
-        env:
-            JAVA_HOME: "/builds/worker/fetches/jdk/jdk-17.0.6+10"
         docker-image: {in-tree: lint}
     always-target: false
     attributes:
+        build_platform: android
         code-review: true
     dependencies:
         build-fat-aar: build-fat-aar-android-geckoview-fat-aar/opt
@@ -22,7 +21,6 @@ job-defaults:
         toolchain:
             - android-sdk-linux
             - android-gradle-dependencies
-            - android-gradle-python-envs
             - linux64-jdk-repack
         build-fat-aar:
             - target.maven.tar.xz
diff --git a/taskcluster/ci/source-test/buildconfig.yml b/taskcluster/kinds/source-test/buildconfig.yml
index 85f0828a54..a7dffefd09 100644
--- a/taskcluster/ci/source-test/buildconfig.yml
+++ b/taskcluster/kinds/source-test/buildconfig.yml
@@ -4,6 +4,7 @@
 ---
 job-defaults:
     description: Make sure the content of .buildconfig.yml matches what gradle knows about its projects
+    always-target: true
     run:
         using: run-task
         cwd: '{checkout}'
@@ -16,7 +17,6 @@ job-defaults:
         docker-image: {in-tree: lint}
         max-run-time: 1800
         env:
-            JAVA_HOME: "/builds/worker/fetches/jdk/jdk-17.0.6+10"
             GRADLE_USER_HOME: "/builds/worker/checkouts/gecko/mobile/android/gradle/dotgradle-online"
             MOZCONFIG: "/builds/worker/checkouts/gecko/mobile/android/config/mozconfigs/android-arm/nightly-android-lints"
             ANDROID_SDK_ROOT: "/builds/worker/fetches/android-sdk-linux"
@@ -28,7 +28,6 @@ job-defaults:
         toolchain:
             - linux64-jdk-repack
             - android-gradle-dependencies
-            - android-gradle-python-envs
             - android-sdk-linux
     use-python: system
 
diff --git a/taskcluster/ci/source-test/clang.yml b/taskcluster/kinds/source-test/clang.yml
index d77066afe7..d77066afe7 100644
--- a/taskcluster/ci/source-test/clang.yml
+++ b/taskcluster/kinds/source-test/clang.yml
diff --git a/taskcluster/ci/source-test/cram.yml b/taskcluster/kinds/source-test/cram.yml
index 6e29e7c6a6..6e29e7c6a6 100644
--- a/taskcluster/ci/source-test/cram.yml
+++ b/taskcluster/kinds/source-test/cram.yml
diff --git a/taskcluster/ci/source-test/doc.yml b/taskcluster/kinds/source-test/doc.yml
index 3e0459f8f0..b876d801ba 100644
--- a/taskcluster/ci/source-test/doc.yml
+++ b/taskcluster/kinds/source-test/doc.yml
@@ -4,13 +4,14 @@
 ---
 generate:
     description: Generate the Sphinx documentation
+    use-python: "3.11"
     platform: doc/opt
     treeherder:
         symbol: doc(generate)
         kind: test
         tier: 1
     run-on-projects: ['trunk']
-    worker-type: t-linux-xlarge-source
+    worker-type: b-linux-medium-gcp
     worker:
         docker-image: {in-tree: "lint"}
         max-run-time: 1800
@@ -37,6 +38,7 @@ generate:
 
 upload:
     description: Generate and upload the Sphinx documentation
+    use-python: "3.11"
     platform: doc/opt
     attributes:
         code-review: true
@@ -45,7 +47,7 @@ upload:
         kind: test
         tier: 2
     run-on-projects: [mozilla-central-only]
-    worker-type: t-linux-xlarge-source
+    worker-type: b-linux-medium-gcp
     worker:
         docker-image: {in-tree: "lint"}
         max-run-time: 1800
diff --git a/taskcluster/ci/source-test/file-metadata.yml b/taskcluster/kinds/source-test/file-metadata.yml
index b1fffaf64f..b1fffaf64f 100644
--- a/taskcluster/ci/source-test/file-metadata.yml
+++ b/taskcluster/kinds/source-test/file-metadata.yml
diff --git a/taskcluster/ci/source-test/jsshell.yml b/taskcluster/kinds/source-test/jsshell.yml
index 2ce0a846d4..2ce0a846d4 100644
--- a/taskcluster/ci/source-test/jsshell.yml
+++ b/taskcluster/kinds/source-test/jsshell.yml
diff --git a/taskcluster/ci/source-test/kind.yml b/taskcluster/kinds/source-test/kind.yml
index f28ee39f96..f28ee39f96 100644
--- a/taskcluster/ci/source-test/kind.yml
+++ b/taskcluster/kinds/source-test/kind.yml
diff --git a/taskcluster/ci/source-test/ktlint.yml b/taskcluster/kinds/source-test/ktlint.yml
index 988f2b6660..1828887dc0 100644
--- a/taskcluster/ci/source-test/ktlint.yml
+++ b/taskcluster/kinds/source-test/ktlint.yml
@@ -15,7 +15,6 @@ job-defaults:
         toolchain:
             - android-sdk-linux
             - android-gradle-dependencies
-            - android-gradle-python-envs
             - linux64-jdk-repack
     platform: 'lint/opt'
     treeherder:
@@ -25,8 +24,6 @@ job-defaults:
     worker:
         docker-image: {in-tree: lint}
         max-run-time: 1200
-        env:
-            JAVA_HOME: "/builds/worker/fetches/jdk/jdk-17.0.6+10"
     when:
         files-changed:
             - "mobile/android/android-components/**"
diff --git a/taskcluster/ci/source-test/mozlint-android.yml b/taskcluster/kinds/source-test/mozlint-android.yml
index d98abe9734..6602d8c818 100644
--- a/taskcluster/ci/source-test/mozlint-android.yml
+++ b/taskcluster/kinds/source-test/mozlint-android.yml
@@ -81,7 +81,6 @@ lints:
         toolchain:
             # Aliases aren't allowed for toolchains installed by fetch.
             - linux64-android-gradle-dependencies
-            - android-gradle-python-envs
             - linux64-android-sdk-linux-repack
             - linux64-jdk-repack
             - linux64-node
diff --git a/taskcluster/ci/source-test/mozlint.yml b/taskcluster/kinds/source-test/mozlint.yml
index e101049103..e101049103 100644
--- a/taskcluster/ci/source-test/mozlint.yml
+++ b/taskcluster/kinds/source-test/mozlint.yml
diff --git a/taskcluster/ci/source-test/node.yml b/taskcluster/kinds/source-test/node.yml
index 1d8c8348fb..1d8c8348fb 100644
--- a/taskcluster/ci/source-test/node.yml
+++ b/taskcluster/kinds/source-test/node.yml
diff --git a/taskcluster/ci/source-test/puppeteer.yml b/taskcluster/kinds/source-test/puppeteer.yml
index 3bfd1a9645..3bfd1a9645 100644
--- a/taskcluster/ci/source-test/puppeteer.yml
+++ b/taskcluster/kinds/source-test/puppeteer.yml
diff --git a/taskcluster/ci/source-test/python.yml b/taskcluster/kinds/source-test/python.yml
index 43680aacad..c8214d17d5 100644
--- a/taskcluster/ci/source-test/python.yml
+++ b/taskcluster/kinds/source-test/python.yml
@@ -47,7 +47,7 @@ firefox-ci:
     when:
         files-changed:
             - '.taskcluster.yml'
-            - 'taskcluster/ci/**'
+            - 'taskcluster/kinds/**'
             - 'taskcluster/**/*.py'
             - 'tools/tryselect/selectors/auto.py'
 
@@ -359,8 +359,8 @@ tryselect:
         subsuite: try
     when:
         files-changed:
-            - 'taskcluster/ci/config.yml'
-            - 'taskcluster/ci/test/**'
+            - 'taskcluster/config.yml'
+            - 'taskcluster/kinds/test/**'
             - 'taskcluster/gecko_taskgraph/transforms/**'
             - 'tools/tryselect/**'
 
diff --git a/taskcluster/ci/source-test/shadow-scheduler.yml b/taskcluster/kinds/source-test/shadow-scheduler.yml
index 97d1b1f30b..97d1b1f30b 100644
--- a/taskcluster/ci/source-test/shadow-scheduler.yml
+++ b/taskcluster/kinds/source-test/shadow-scheduler.yml
diff --git a/taskcluster/ci/source-test/taskgraph.yml b/taskcluster/kinds/source-test/taskgraph.yml
index 3065c80482..da3b27d33b 100644
--- a/taskcluster/ci/source-test/taskgraph.yml
+++ b/taskcluster/kinds/source-test/taskgraph.yml
@@ -38,5 +38,5 @@ diff:
             python taskcluster/scripts/misc/summarize-tgdiff.py /builds/worker/artifacts/diffs/ 20
     when:
         files-changed:
-            - 'taskcluster/ci/**'
+            - 'taskcluster/kinds/**'
             - 'taskcluster/**/*.py'
diff --git a/taskcluster/ci/source-test/vendor.yml b/taskcluster/kinds/source-test/vendor.yml
index c6594c6f68..c6594c6f68 100644
--- a/taskcluster/ci/source-test/vendor.yml
+++ b/taskcluster/kinds/source-test/vendor.yml
diff --git a/taskcluster/ci/source-test/webcompat.yml b/taskcluster/kinds/source-test/webcompat.yml
index 66ff7910a6..66ff7910a6 100644
--- a/taskcluster/ci/source-test/webcompat.yml
+++ b/taskcluster/kinds/source-test/webcompat.yml
diff --git a/taskcluster/ci/source-test/webidl.yml b/taskcluster/kinds/source-test/webidl.yml
index eec7a75e38..eec7a75e38 100644
--- a/taskcluster/ci/source-test/webidl.yml
+++ b/taskcluster/kinds/source-test/webidl.yml
diff --git a/taskcluster/ci/source-test/wpt-manifest.yml b/taskcluster/kinds/source-test/wpt-manifest.yml
index 06b29b60f5..06b29b60f5 100644
--- a/taskcluster/ci/source-test/wpt-manifest.yml
+++ b/taskcluster/kinds/source-test/wpt-manifest.yml
diff --git a/taskcluster/ci/source-test/wpt-metadata.yml b/taskcluster/kinds/source-test/wpt-metadata.yml
index b2c54d62b9..b2c54d62b9 100644
--- a/taskcluster/ci/source-test/wpt-metadata.yml
+++ b/taskcluster/kinds/source-test/wpt-metadata.yml
diff --git a/taskcluster/ci/spidermonkey/kind.yml b/taskcluster/kinds/spidermonkey/kind.yml
index 358ffeeb3f..560ac9a58b 100644
--- a/taskcluster/ci/spidermonkey/kind.yml
+++ b/taskcluster/kinds/spidermonkey/kind.yml
@@ -10,6 +10,7 @@ kind-dependencies:
 transforms:
     - gecko_taskgraph.transforms.spidermonkey:transforms
     - gecko_taskgraph.transforms.build_attrs:transforms
+    - gecko_taskgraph.transforms.build_schedules:transforms
     - gecko_taskgraph.transforms.build_lints:transforms
     - gecko_taskgraph.transforms.job:transforms
     - gecko_taskgraph.transforms.task:transforms
@@ -50,7 +51,7 @@ job-defaults:
             - nsprpub/**
             - python/**
             - taskcluster/moz.build
-            - taskcluster/ci/spidermonkey/kind.yml
+            - taskcluster/kinds/spidermonkey/kind.yml
             - testing/mozbase/**
             - testing/web-platform/**
             - test.mozbuild
diff --git a/taskcluster/ci/spidermonkey/linux.yml b/taskcluster/kinds/spidermonkey/linux.yml
index fbf3c8d0e2..fbf3c8d0e2 100644
--- a/taskcluster/ci/spidermonkey/linux.yml
+++ b/taskcluster/kinds/spidermonkey/linux.yml
diff --git a/taskcluster/ci/spidermonkey/windows.yml b/taskcluster/kinds/spidermonkey/windows.yml
index 2fa90deb8e..2fa90deb8e 100644
--- a/taskcluster/ci/spidermonkey/windows.yml
+++ b/taskcluster/kinds/spidermonkey/windows.yml
diff --git a/taskcluster/ci/startup-test/kind.yml b/taskcluster/kinds/startup-test/kind.yml
index 3e6975ae92..3e6975ae92 100644
--- a/taskcluster/ci/startup-test/kind.yml
+++ b/taskcluster/kinds/startup-test/kind.yml
diff --git a/taskcluster/ci/static-analysis-autotest/kind.yml b/taskcluster/kinds/static-analysis-autotest/kind.yml
index 39497268a8..3901e0a7fd 100644
--- a/taskcluster/ci/static-analysis-autotest/kind.yml
+++ b/taskcluster/kinds/static-analysis-autotest/kind.yml
@@ -9,6 +9,7 @@ kind-dependencies:
 
 transforms:
     - gecko_taskgraph.transforms.build_attrs:transforms
+    - gecko_taskgraph.transforms.build_schedules:transforms
     - gecko_taskgraph.transforms.build_lints:transforms
     - gecko_taskgraph.transforms.job:transforms
     - gecko_taskgraph.transforms.task:transforms
diff --git a/taskcluster/ci/system-symbols-reprocess/kind.yml b/taskcluster/kinds/system-symbols-reprocess/kind.yml
index 5b81817188..e96f8f4fa3 100644
--- a/taskcluster/ci/system-symbols-reprocess/kind.yml
+++ b/taskcluster/kinds/system-symbols-reprocess/kind.yml
@@ -38,7 +38,7 @@ jobs:
                 DUMP_SYMS: "/bin/false"
         run:
             using: run-task
-            command: {artifact-reference: "${MOZ_FETCHES_DIR}/symbol-scrapers/reprocess.sh <system-symbols/public/build/target.crashreporter-symbols.zip>"}
+            command: {task-reference: "${MOZ_FETCHES_DIR}/symbol-scrapers/reprocess.sh <system-symbols>"}
         fetches:
             fetch:
                 - symbol-scrapers
diff --git a/taskcluster/ci/system-symbols-upload/kind.yml b/taskcluster/kinds/system-symbols-upload/kind.yml
index dd9462a84b..e36f7afd84 100644
--- a/taskcluster/ci/system-symbols-upload/kind.yml
+++ b/taskcluster/kinds/system-symbols-upload/kind.yml
@@ -28,7 +28,7 @@ jobs:
                 SYMBOL_SECRET: "project/releng/gecko/build/level-{level}/gecko-symbol-upload"
         run:
             using: mach
-            mach: {artifact-reference: "python toolkit/crashreporter/tools/upload_symbols.py <system-symbols/public/build/target.crashreporter-symbols.zip> --ignore-missing"}
+            mach: {task-reference: "python toolkit/crashreporter/tools/upload_symbols.py --task-id <system-symbols> --ignore-missing"}
             sparse-profile: upload-symbols
         scopes:
             - secrets:get:project/releng/gecko/build/level-{level}/gecko-symbol-upload
diff --git a/taskcluster/ci/system-symbols/kind.yml b/taskcluster/kinds/system-symbols/kind.yml
index 0090454a68..0090454a68 100644
--- a/taskcluster/ci/system-symbols/kind.yml
+++ b/taskcluster/kinds/system-symbols/kind.yml
diff --git a/taskcluster/ci/test-apk/kind.yml b/taskcluster/kinds/test-apk/kind.yml
index b1fe6c2a88..59225f431a 100644
--- a/taskcluster/ci/test-apk/kind.yml
+++ b/taskcluster/kinds/test-apk/kind.yml
@@ -17,6 +17,7 @@ kind-dependencies:
 
 job-defaults:
     attributes:
+        build_platform: android
         retrigger: true
     dependencies:
         build-fat-aar: build-fat-aar-android-geckoview-fat-aar/opt
@@ -24,7 +25,6 @@ job-defaults:
         toolchain:
             - android-sdk-linux
             - android-gradle-dependencies
-            - android-gradle-python-envs
             - linux64-jdk
         build-fat-aar:
             - target.maven.tar.xz
diff --git a/taskcluster/ci/test-components/kind.yml b/taskcluster/kinds/test-components/kind.yml
index bbdc5f7edd..8f4675b076 100644
--- a/taskcluster/ci/test-components/kind.yml
+++ b/taskcluster/kinds/test-components/kind.yml
@@ -18,6 +18,7 @@ kind-dependencies:
 
 job-defaults:
     attributes:
+        build_platform: android
         build-type: debug
         retrigger: true
     dependencies:
@@ -26,7 +27,6 @@ job-defaults:
         toolchain:
             - android-sdk-linux
             - android-gradle-dependencies
-            - android-gradle-python-envs
             - linux64-jdk
         build-fat-aar:
             - target.maven.tar.xz
diff --git a/taskcluster/ci/test/awsy.yml b/taskcluster/kinds/test/awsy.yml
index 6ba85dcb82..6ba85dcb82 100644
--- a/taskcluster/ci/test/awsy.yml
+++ b/taskcluster/kinds/test/awsy.yml
diff --git a/taskcluster/ci/test/browsertime-desktop.yml b/taskcluster/kinds/test/browsertime-desktop.yml
index f4a1abe080..90bf76201c 100644
--- a/taskcluster/ci/test/browsertime-desktop.yml
+++ b/taskcluster/kinds/test/browsertime-desktop.yml
@@ -15,7 +15,7 @@ job-defaults:
     limit-platforms:
         by-app:
             chrome:
-                - .*shippable.*
+                - .*64.*shippable.*
             safari:
                 - .*macos.*shippable.*
             custom-car:
diff --git a/taskcluster/ci/test/browsertime-mobile.yml b/taskcluster/kinds/test/browsertime-mobile.yml
index 0ef0c0519e..0ef0c0519e 100644
--- a/taskcluster/ci/test/browsertime-mobile.yml
+++ b/taskcluster/kinds/test/browsertime-mobile.yml
diff --git a/taskcluster/ci/test/compiled.yml b/taskcluster/kinds/test/compiled.yml
index ebe6b9bb2b..f91ccd9970 100644
--- a/taskcluster/ci/test/compiled.yml
+++ b/taskcluster/kinds/test/compiled.yml
@@ -49,13 +49,13 @@ gtest:
     description: "GTests run"
     suite: gtest
     treeherder-symbol: GTest
-    instance-size: xlarge-noscratch
+    instance-size: large-noscratch
     run-on-projects:
         by-variant:
             1proc:
                 by-test-platform:
                     .*android.*: built-projects
-                    .*(devedition|tsan|wayland).*: []
+                    .*(devedition|wayland).*: []
                     linux1804-32-qr/opt: []  # try only, shippable on m-c
                     linux1804-32-qr/debug: ['mozilla-central']  # try and m-c
                     linux1804-32-shippable-qr/opt: ['mozilla-central']  # try and m-c
diff --git a/taskcluster/ci/test/firefox-ui.yml b/taskcluster/kinds/test/firefox-ui.yml
index c45bb3d138..c45bb3d138 100644
--- a/taskcluster/ci/test/firefox-ui.yml
+++ b/taskcluster/kinds/test/firefox-ui.yml
diff --git a/taskcluster/ci/test/kind.yml b/taskcluster/kinds/test/kind.yml
index e9c2b1e5e9..e9c2b1e5e9 100644
--- a/taskcluster/ci/test/kind.yml
+++ b/taskcluster/kinds/test/kind.yml
diff --git a/taskcluster/ci/test/marionette.yml b/taskcluster/kinds/test/marionette.yml
index d586a6cf24..d586a6cf24 100644
--- a/taskcluster/ci/test/marionette.yml
+++ b/taskcluster/kinds/test/marionette.yml
diff --git a/taskcluster/ci/test/misc.yml b/taskcluster/kinds/test/misc.yml
index 8f1f93157c..8f1f93157c 100644
--- a/taskcluster/ci/test/misc.yml
+++ b/taskcluster/kinds/test/misc.yml
diff --git a/taskcluster/ci/test/mochitest.yml b/taskcluster/kinds/test/mochitest.yml
index 1339652baf..91e44b5fe5 100644
--- a/taskcluster/ci/test/mochitest.yml
+++ b/taskcluster/kinds/test/mochitest.yml
@@ -269,16 +269,14 @@ mochitest-browser-chrome:
                     default: 7
             default:
                 by-test-platform:
-                    linux.*wayland.*/opt: 8
-                    linux.*wayland.*/debug: 12
                     linux.*-qr/debug: 16
                     linux.*64-asan-qr/opt: 16
                     linux.*64-tsan-qr/opt: 32
-                    macosx.*64-qr/debug: 12
                     macosx.*64.*/opt: 10
+                    windows11-32.*/opt: 10
                     windows.*-ccov.*/.*: 14
                     windows.*-asan-qr/opt: 14
-                    windows.*32-qr/debug: 12
+                    .*/debug: 12
                     default: 8
     max-run-time:
         by-variant:
@@ -302,7 +300,7 @@ mochitest-browser-chrome:
         chunked: true
     instance-size:
         by-test-platform:
-            linux.*64-asan-qr/opt: xlarge  # runs out of memory frequently
+            linux.*64-asan-qr/opt: xlarge-noscratch  # runs out of memory frequently
             default: default
     allow-software-gl-layers: false
 
diff --git a/taskcluster/ci/test/reftest.yml b/taskcluster/kinds/test/reftest.yml
index 21474f7aad..be4518e592 100644
--- a/taskcluster/ci/test/reftest.yml
+++ b/taskcluster/kinds/test/reftest.yml
@@ -176,6 +176,7 @@ reftest:
             windows11.*/opt: 3
             default: 8
     variants:
+        - draw-snapshot
         - geckoview-no-fission-ship
         - no-fission
         - webrender-dcomp-disabled
@@ -186,6 +187,10 @@ reftest:
         - webrender-sw
     run-on-projects:
         by-variant:
+            draw-snapshot:
+                by-test-platform:
+                    linux1804.*/debug: built-projects
+                    default: []
             webrender-sw+no-fission:
                 by-test-platform:
                     android-em-7.0-x86_64-qr/debug: built-projects
@@ -231,6 +236,8 @@ reftest:
                 macosx.*64/opt: false
                 windows.*/opt: false
                 default: true
+        extra-options:
+            - --setpref=layers.acceleration.force-enabled=true
     tier:
         by-variant:
             no-fission:
@@ -266,16 +273,3 @@ reftest-qr:
         chunked: true
     tier: 2
     virtualization: virtual
-
-reftest-snapshot:
-    description: "Reftest snapshot"
-    treeherder-symbol: R(Rs)
-    virtualization: virtual
-    run-on-projects:
-        by-test-platform:
-            linux1804-64-qr/debug: ['trunk']
-            default: []
-    tier: default
-    chunks: 8
-    mozharness:
-        chunked: true
diff --git a/taskcluster/ci/test/talos.yml b/taskcluster/kinds/test/talos.yml
index 3ce85fd039..68e2f094ad 100644
--- a/taskcluster/ci/test/talos.yml
+++ b/taskcluster/kinds/test/talos.yml
@@ -796,7 +796,7 @@ talos-pdfpaint:
                     (linux|windows|macos)(?!.*shippable).*: []
                     (linux|windows10-64|macos)(?!.*-qr).*: []
                     default: [trunk]
-    max-run-time: 1800
+    max-run-time: 2100
     mozharness:
         extra-options:
             - --suite=pdfpaint
diff --git a/taskcluster/ci/test/test-platforms.yml b/taskcluster/kinds/test/test-platforms.yml
index b957b8a4db..b957b8a4db 100644
--- a/taskcluster/ci/test/test-platforms.yml
+++ b/taskcluster/kinds/test/test-platforms.yml
diff --git a/taskcluster/ci/test/test-sets.yml b/taskcluster/kinds/test/test-sets.yml
index 4a8f3d019b..ffc18b2d66 100644
--- a/taskcluster/ci/test/test-sets.yml
+++ b/taskcluster/kinds/test/test-sets.yml
@@ -18,6 +18,7 @@
 webgpu:
     - mochitest-webgpu
     - web-platform-tests-webgpu
+    - web-platform-tests-webgpu-backlog
 
 web-platform-tests:
     - web-platform-tests
@@ -173,7 +174,6 @@ linux1804-tests:
     - mochitest-webgl2-core
     - mochitest-webgl2-ext
     - reftest
-    - reftest-snapshot
     - telemetry-tests-client
     - test-verify
     - test-verify-gpu
@@ -212,7 +212,6 @@ linux2204-wayland-tests:
     - mochitest-webgl2-core
     - mochitest-webgl2-ext
     - reftest
-    - reftest-snapshot
     - telemetry-tests-client
     - test-verify
     - test-verify-gpu
diff --git a/taskcluster/ci/test/variants.yml b/taskcluster/kinds/test/variants.yml
index 8cb31ee047..4914982895 100644
--- a/taskcluster/ci/test/variants.yml
+++ b/taskcluster/kinds/test/variants.yml
@@ -373,9 +373,10 @@ msix:
                         || "ccov" in task["test-platform"]
                     )
                 '
-    merge:
+    replace:
         mozharness:
             extra-options:
+                - "--variant=msix"
                 - "--installer-path installer.msix"
 
 http3:
@@ -414,3 +415,22 @@ http2:
         mozharness:
             extra-options:
                 - "--use-http2-server"
+
+draw-snapshot:
+    description: "{description} with draw snapshot"
+    component: "Core::Graphics"
+    suffix: "s"
+    mozinfo: "snapshot"
+    expiration: "never"
+    when:
+        $eval: '(
+                    "linux" in task["test-platform"]
+                    && "debug" in task["test-platform"]
+                )
+                    && "reftest" == task["try-name"]
+                '
+    replace:
+        virtualization: virtual
+        mozharness:
+            extra-options:
+                - "--setpref=reftest.use-draw-snapshot=true"
diff --git a/taskcluster/ci/test/web-platform.yml b/taskcluster/kinds/test/web-platform.yml
index 4a1818cbd6..b4cf3a732b 100644
--- a/taskcluster/ci/test/web-platform.yml
+++ b/taskcluster/kinds/test/web-platform.yml
@@ -69,8 +69,13 @@ web-platform-tests:
             default: 7200
     variants:
         - no-fission
+        - geckoview-no-fission-ship
     run-on-projects:
         by-variant:
+            geckoview-no-fission-ship:
+                by-test-platform:
+                    android-em-7.0-x86_64-qr/debug-isolated-process: []
+                    default: []
             no-fission:
                 by-test-platform:
                     android-em-7.0-x86_64-qr/debug-isolated-process: []
@@ -229,11 +234,43 @@ web-platform-tests-webgpu:
     virtualization: virtual-with-gpu
     tier:
         by-test-platform:
-            android.*: 3  # https://bugzilla.mozilla.org/show_bug.cgi?id=1849914
-            macos.*: 3  # https://bugzilla.mozilla.org/show_bug.cgi?id=1849913
-            linux2204.*-64.*: 3  # https://bugzilla.mozilla.org/show_bug.cgi?id=1849912
-            windows.*-64.*: 3  # https://bugzilla.mozilla.org/show_bug.cgi?id=1849911
-            default: 3
+            android.*: 2  # https://bugzilla.mozilla.org/show_bug.cgi?id=1849914
+            macos.*: 2  # https://bugzilla.mozilla.org/show_bug.cgi?id=1849913
+            linux2204.*-64.*: 2  # https://bugzilla.mozilla.org/show_bug.cgi?id=1849912
+            windows.*-64.*: 2  # https://bugzilla.mozilla.org/show_bug.cgi?id=1849911
+            default: 2
+    # Choice of `chunks`:
+    # Time-to-TEST-START on Windows is ~7m (~9m for debug).
+    # (though we're working on reducing this!)
+    # Devs would love ~10-15m runs, but we don't want to be more than
+    # 50% overhead, so let's aim for 15m (20m debug)
+    chunks: 1
+    max-run-time:
+        by-test-platform:
+            .*/debug: 2700  # 45m
+            default: 1800  # 30m
+    variants: []  # We don't need sw or nofis testing.
+    run-on-projects:
+        by-test-platform:
+            android.*: []  # https://bugzilla.mozilla.org/show_bug.cgi?id=1836811
+            .*-wayland/debug.*: []  # https://bugzilla.mozilla.org/show_bug.cgi?id=1864700
+            default: ['trunk']
+    mozharness:
+        chunked: true
+        extra-options:
+            - --test-type=testharness
+            - --skip-implementation-status=backlog
+            - --skip-implementation-status=not-implementing
+            - --default-exclude
+            - --tag=webgpu
+            - --exclude-tag=canvas
+
+web-platform-tests-webgpu-backlog:
+    description: "Web platform WebGPU test run (backlog)"
+    suite: web-platform-tests
+    treeherder-symbol: W(webgpu-backlog)
+    virtualization: virtual-with-gpu
+    tier: 3
     # Choice of `chunks`:
     # Time-to-TEST-START on Windows is ~7m (~9m for debug).
     # (though we're working on reducing this!)
@@ -265,12 +302,18 @@ web-platform-tests-webgpu:
                     - --default-exclude
                     - --tag=webgpu
                     - --exclude-tag=canvas
+                    - --skip-implementation-status=implementing
+                    - --skip-implementation-status=not-implementing
+                    - --backlog
                     - --setpref=gfx.webgpu.ignore-blocklist=true
                 default:
                     - --test-type=testharness
                     - --default-exclude
                     - --tag=webgpu
                     - --exclude-tag=canvas
+                    - --skip-implementation-status=implementing
+                    - --skip-implementation-status=not-implementing
+                    - --backlog
 
 web-platform-tests-canvas:
     description: "Web platform Canvas test run"
diff --git a/taskcluster/ci/test/xpcshell.yml b/taskcluster/kinds/test/xpcshell.yml
index 02a615bdc2..7b417e869b 100644
--- a/taskcluster/ci/test/xpcshell.yml
+++ b/taskcluster/kinds/test/xpcshell.yml
@@ -5,10 +5,7 @@
 job-defaults:
     suite:
         category: xpcshell
-        name:
-            by-variant:
-                msix: xpcshell-msix
-                default: xpcshell
+        name: xpcshell
     target:
         by-test-platform:
             android-em-7.*: geckoview-test_runner.apk
diff --git a/taskcluster/ci/toolchain/android.yml b/taskcluster/kinds/toolchain/android.yml
index 6c2c558c9c..333aa868fa 100644
--- a/taskcluster/ci/toolchain/android.yml
+++ b/taskcluster/kinds/toolchain/android.yml
@@ -140,7 +140,7 @@ linux64-jdk-repack:
         toolchain-artifact: project/gecko/jdk/jdk-linux.tar.zst
         toolchain-alias: linux64-jdk
         toolchain-env:
-            JAVA_HOME: "/builds/worker/fetches/jdk/jdk-17.0.10+7"
+            JAVA_HOME: "/builds/worker/fetches/jdk/jdk-17.0.11+9"
 
 linux64-android-sdk-linux-repack:
     description: "Android SDK (Linux) repack toolchain build"
@@ -218,7 +218,6 @@ linux64-android-gradle-dependencies:
             - linux64-android-sdk-linux-repack
             - linux64-jdk-repack
             - linux64-node
-            - android-gradle-python-envs
 
 linux64-android-gradle-dependencies-lite:
     description: "Android Lite Gradle dependencies toolchain task"
@@ -251,14 +250,3 @@ linux64-android-gradle-dependencies-lite:
             - linux64-android-sdk-linux-repack
             - linux64-jdk-repack
             - linux64-node
-            - android-gradle-python-envs
-
-android-gradle-python-envs:
-    description: "gradle-python-envs plugin toolchain task"
-    treeherder:
-        symbol: TL(gradle-python-envs)
-    run:
-        script: gradle-python-envs.sh
-        arguments: ['0.0.31']
-        sparse-profile: null
-        toolchain-artifact: public/build/gradle-python-envs-0.0.31.tar.zst
diff --git a/taskcluster/ci/toolchain/cargo-vet.yml b/taskcluster/kinds/toolchain/cargo-vet.yml
index 3f1cb9756a..3f1cb9756a 100644
--- a/taskcluster/ci/toolchain/cargo-vet.yml
+++ b/taskcluster/kinds/toolchain/cargo-vet.yml
diff --git a/taskcluster/ci/toolchain/cbindgen.yml b/taskcluster/kinds/toolchain/cbindgen.yml
index 69d34b6f3b..69d34b6f3b 100644
--- a/taskcluster/ci/toolchain/cbindgen.yml
+++ b/taskcluster/kinds/toolchain/cbindgen.yml
diff --git a/taskcluster/ci/toolchain/clang-tidy.yml b/taskcluster/kinds/toolchain/clang-tidy.yml
index 02d089eca3..02d089eca3 100644
--- a/taskcluster/ci/toolchain/clang-tidy.yml
+++ b/taskcluster/kinds/toolchain/clang-tidy.yml
diff --git a/taskcluster/ci/toolchain/clang.yml b/taskcluster/kinds/toolchain/clang.yml
index a9cf04e0b9..a9cf04e0b9 100644
--- a/taskcluster/ci/toolchain/clang.yml
+++ b/taskcluster/kinds/toolchain/clang.yml
diff --git a/taskcluster/ci/toolchain/compiler-rt.yml b/taskcluster/kinds/toolchain/compiler-rt.yml
index 631024fbf9..631024fbf9 100644
--- a/taskcluster/ci/toolchain/compiler-rt.yml
+++ b/taskcluster/kinds/toolchain/compiler-rt.yml
diff --git a/taskcluster/ci/toolchain/dist-toolchains.yml b/taskcluster/kinds/toolchain/dist-toolchains.yml
index 31b60918e6..31b60918e6 100644
--- a/taskcluster/ci/toolchain/dist-toolchains.yml
+++ b/taskcluster/kinds/toolchain/dist-toolchains.yml
diff --git a/taskcluster/ci/toolchain/dump-syms.yml b/taskcluster/kinds/toolchain/dump-syms.yml
index 05aee5e352..05aee5e352 100644
--- a/taskcluster/ci/toolchain/dump-syms.yml
+++ b/taskcluster/kinds/toolchain/dump-syms.yml
diff --git a/taskcluster/ci/toolchain/fix-stacks.yml b/taskcluster/kinds/toolchain/fix-stacks.yml
index e11bf0b166..e11bf0b166 100644
--- a/taskcluster/ci/toolchain/fix-stacks.yml
+++ b/taskcluster/kinds/toolchain/fix-stacks.yml
diff --git a/taskcluster/ci/toolchain/gcc.yml b/taskcluster/kinds/toolchain/gcc.yml
index 2a09c37e6c..2a09c37e6c 100644
--- a/taskcluster/ci/toolchain/gcc.yml
+++ b/taskcluster/kinds/toolchain/gcc.yml
diff --git a/taskcluster/ci/toolchain/geckodriver.yml b/taskcluster/kinds/toolchain/geckodriver.yml
index 252befa3fb..252befa3fb 100644
--- a/taskcluster/ci/toolchain/geckodriver.yml
+++ b/taskcluster/kinds/toolchain/geckodriver.yml
diff --git a/taskcluster/ci/toolchain/gn.yml b/taskcluster/kinds/toolchain/gn.yml
index d12b0f19c5..d12b0f19c5 100644
--- a/taskcluster/ci/toolchain/gn.yml
+++ b/taskcluster/kinds/toolchain/gn.yml
diff --git a/taskcluster/ci/toolchain/grcov.yml b/taskcluster/kinds/toolchain/grcov.yml
index 15fed68732..15fed68732 100644
--- a/taskcluster/ci/toolchain/grcov.yml
+++ b/taskcluster/kinds/toolchain/grcov.yml
diff --git a/taskcluster/ci/toolchain/hostutils.yml b/taskcluster/kinds/toolchain/hostutils.yml
index d9974e917a..d9974e917a 100644
--- a/taskcluster/ci/toolchain/hostutils.yml
+++ b/taskcluster/kinds/toolchain/hostutils.yml
diff --git a/taskcluster/ci/toolchain/kind.yml b/taskcluster/kinds/toolchain/kind.yml
index 524bb20670..524bb20670 100644
--- a/taskcluster/ci/toolchain/kind.yml
+++ b/taskcluster/kinds/toolchain/kind.yml
diff --git a/taskcluster/ci/toolchain/libunwind.yml b/taskcluster/kinds/toolchain/libunwind.yml
index 5a1972f3f6..5a1972f3f6 100644
--- a/taskcluster/ci/toolchain/libunwind.yml
+++ b/taskcluster/kinds/toolchain/libunwind.yml
diff --git a/taskcluster/ci/toolchain/llvm-symbolizer.yml b/taskcluster/kinds/toolchain/llvm-symbolizer.yml
index 11b63397c2..11b63397c2 100644
--- a/taskcluster/ci/toolchain/llvm-symbolizer.yml
+++ b/taskcluster/kinds/toolchain/llvm-symbolizer.yml
diff --git a/taskcluster/ci/toolchain/macos-sdk.yml b/taskcluster/kinds/toolchain/macos-sdk.yml
index 194a1ee20a..194a1ee20a 100644
--- a/taskcluster/ci/toolchain/macos-sdk.yml
+++ b/taskcluster/kinds/toolchain/macos-sdk.yml
diff --git a/taskcluster/ci/toolchain/mingw.yml b/taskcluster/kinds/toolchain/mingw.yml
index a14413669f..a14413669f 100644
--- a/taskcluster/ci/toolchain/mingw.yml
+++ b/taskcluster/kinds/toolchain/mingw.yml
diff --git a/taskcluster/ci/toolchain/minidump-stackwalk.yml b/taskcluster/kinds/toolchain/minidump-stackwalk.yml
index f0f9b3e70c..f0f9b3e70c 100644
--- a/taskcluster/ci/toolchain/minidump-stackwalk.yml
+++ b/taskcluster/kinds/toolchain/minidump-stackwalk.yml
diff --git a/taskcluster/ci/toolchain/misc.yml b/taskcluster/kinds/toolchain/misc.yml
index 80356f5be6..63bd1f3c02 100644
--- a/taskcluster/ci/toolchain/misc.yml
+++ b/taskcluster/kinds/toolchain/misc.yml
@@ -45,6 +45,8 @@ linux64-cctools-port:
         symbol: TL(cctools-clang)
     run:
         script: build-cctools-port.sh
+        resources:
+            - taskcluster/scripts/misc/cctools.patch
         toolchain-artifact: public/build/cctools.tar.zst
     fetches:
         toolchain:
diff --git a/taskcluster/ci/toolchain/nasm.yml b/taskcluster/kinds/toolchain/nasm.yml
index 866aa5b0f6..866aa5b0f6 100644
--- a/taskcluster/ci/toolchain/nasm.yml
+++ b/taskcluster/kinds/toolchain/nasm.yml
diff --git a/taskcluster/ci/toolchain/node.yml b/taskcluster/kinds/toolchain/node.yml
index 6ab3511aab..6ab3511aab 100644
--- a/taskcluster/ci/toolchain/node.yml
+++ b/taskcluster/kinds/toolchain/node.yml
diff --git a/taskcluster/ci/toolchain/pkgconf.yml b/taskcluster/kinds/toolchain/pkgconf.yml
index c97ead7acc..c97ead7acc 100644
--- a/taskcluster/ci/toolchain/pkgconf.yml
+++ b/taskcluster/kinds/toolchain/pkgconf.yml
diff --git a/taskcluster/ci/toolchain/python.yml b/taskcluster/kinds/toolchain/python.yml
index e610ee6e4e..e610ee6e4e 100644
--- a/taskcluster/ci/toolchain/python.yml
+++ b/taskcluster/kinds/toolchain/python.yml
diff --git a/taskcluster/ci/toolchain/resourcemonitor.yml b/taskcluster/kinds/toolchain/resourcemonitor.yml
index f4ef9a41c4..f4ef9a41c4 100644
--- a/taskcluster/ci/toolchain/resourcemonitor.yml
+++ b/taskcluster/kinds/toolchain/resourcemonitor.yml
diff --git a/taskcluster/ci/toolchain/rust-size.yml b/taskcluster/kinds/toolchain/rust-size.yml
index 09963589a6..09963589a6 100644
--- a/taskcluster/ci/toolchain/rust-size.yml
+++ b/taskcluster/kinds/toolchain/rust-size.yml
diff --git a/taskcluster/ci/toolchain/rust.yml b/taskcluster/kinds/toolchain/rust.yml
index 437c497d71..e1e2778f68 100644
--- a/taskcluster/ci/toolchain/rust.yml
+++ b/taskcluster/kinds/toolchain/rust.yml
@@ -11,12 +11,12 @@ job-defaults:
         script: repack_rust.py
         toolchain-artifact: public/build/rustc.tar.zst
 
-linux64-rust-1.74:
+linux64-rust-1.76:
     treeherder:
-        symbol: TL(rust-1.74)
+        symbol: TL(rust-1.76)
     run:
         arguments: [
-            '--channel', '1.74.0',
+            '--channel', '1.76.0',
             '--host', 'x86_64-unknown-linux-gnu',
             '--target', 'x86_64-unknown-linux-gnu',
             '--target', 'i686-unknown-linux-gnu',
diff --git a/taskcluster/ci/toolchain/sccache.yml b/taskcluster/kinds/toolchain/sccache.yml
index 6fa9ab46a5..6fa9ab46a5 100644
--- a/taskcluster/ci/toolchain/sccache.yml
+++ b/taskcluster/kinds/toolchain/sccache.yml
diff --git a/taskcluster/ci/toolchain/sysroot.yml b/taskcluster/kinds/toolchain/sysroot.yml
index e4479d16e0..e4479d16e0 100644
--- a/taskcluster/ci/toolchain/sysroot.yml
+++ b/taskcluster/kinds/toolchain/sysroot.yml
diff --git a/taskcluster/ci/trigger-comm-central/kind.yml b/taskcluster/kinds/trigger-comm-central/kind.yml
index 0b6dfb2c64..0b6dfb2c64 100644
--- a/taskcluster/ci/trigger-comm-central/kind.yml
+++ b/taskcluster/kinds/trigger-comm-central/kind.yml
diff --git a/taskcluster/ci/ui-test-apk/kind.yml b/taskcluster/kinds/ui-test-apk/kind.yml
index 405a59f03a..d80d5139b7 100644
--- a/taskcluster/ci/ui-test-apk/kind.yml
+++ b/taskcluster/kinds/ui-test-apk/kind.yml
@@ -17,6 +17,7 @@ kind-dependencies:
 
 job-defaults:
     attributes:
+        build_platform: android
         build-type: debug
         retrigger: true
     fetches:
diff --git a/taskcluster/ci/updatebot/kind.yml b/taskcluster/kinds/updatebot/kind.yml
index 2a1bc00d42..8b6ed560a1 100644
--- a/taskcluster/ci/updatebot/kind.yml
+++ b/taskcluster/kinds/updatebot/kind.yml
@@ -69,7 +69,7 @@ jobs:
             #       path: build\src\obj-build\depot_tools
             # end _GENERATE_DEPOT_TOOLS_BINARIES_
             env:
-                TOOLTOOL_MANIFEST: "taskcluster/ci/updatebot/tooltool-manifests/updatebot.manifest"
+                TOOLTOOL_MANIFEST: "taskcluster/kinds/updatebot/tooltool-manifests/updatebot.manifest"
                 MSYSTEM: "MINGW64"
         run:
             using: run-task
diff --git a/taskcluster/ci/updatebot/moz.build b/taskcluster/kinds/updatebot/moz.build
index 315dc32600..315dc32600 100644
--- a/taskcluster/ci/updatebot/moz.build
+++ b/taskcluster/kinds/updatebot/moz.build
diff --git a/taskcluster/ci/updatebot/tooltool-manifests/updatebot.manifest b/taskcluster/kinds/updatebot/tooltool-manifests/updatebot.manifest
index f284d80914..f284d80914 100644
--- a/taskcluster/ci/updatebot/tooltool-manifests/updatebot.manifest
+++ b/taskcluster/kinds/updatebot/tooltool-manifests/updatebot.manifest
diff --git a/taskcluster/ci/upload-generated-sources-dummy/kind.yml b/taskcluster/kinds/upload-generated-sources-dummy/kind.yml
index 56e6762839..56e6762839 100644
--- a/taskcluster/ci/upload-generated-sources-dummy/kind.yml
+++ b/taskcluster/kinds/upload-generated-sources-dummy/kind.yml
diff --git a/taskcluster/ci/upload-generated-sources/kind.yml b/taskcluster/kinds/upload-generated-sources/kind.yml
index 86123d336d..8ae78b0b28 100644
--- a/taskcluster/ci/upload-generated-sources/kind.yml
+++ b/taskcluster/kinds/upload-generated-sources/kind.yml
@@ -27,7 +27,7 @@ jobs:
         description: Upload generated source files from build
         from-deps:
             group-by: single-with-filters
-        worker-type: t-linux-xlarge
+        worker-type: b-linux-medium-gcp
         treeherder:
             symbol: Ugs
             kind: build
diff --git a/taskcluster/ci/upload-symbols-dummy/kind.yml b/taskcluster/kinds/upload-symbols-dummy/kind.yml
index d9202ef373..d9202ef373 100644
--- a/taskcluster/ci/upload-symbols-dummy/kind.yml
+++ b/taskcluster/kinds/upload-symbols-dummy/kind.yml
diff --git a/taskcluster/ci/upload-symbols/kind.yml b/taskcluster/kinds/upload-symbols/kind.yml
index cf6875520a..cf6875520a 100644
--- a/taskcluster/ci/upload-symbols/kind.yml
+++ b/taskcluster/kinds/upload-symbols/kind.yml
diff --git a/taskcluster/ci/valgrind/kind.yml b/taskcluster/kinds/valgrind/kind.yml
index 9ccff4188f..068fd572a1 100644
--- a/taskcluster/ci/valgrind/kind.yml
+++ b/taskcluster/kinds/valgrind/kind.yml
@@ -9,6 +9,7 @@ kind-dependencies:
 
 transforms:
     - gecko_taskgraph.transforms.build_attrs:transforms
+    - gecko_taskgraph.transforms.build_schedules:transforms
     - gecko_taskgraph.transforms.build_lints:transforms
     - gecko_taskgraph.transforms.job:transforms
     - gecko_taskgraph.transforms.task:transforms
diff --git a/taskcluster/ci/webrender/kind.yml b/taskcluster/kinds/webrender/kind.yml
index 9443a096c1..9443a096c1 100644
--- a/taskcluster/ci/webrender/kind.yml
+++ b/taskcluster/kinds/webrender/kind.yml
diff --git a/taskcluster/scripts/builder/build-android.sh b/taskcluster/scripts/builder/build-android.sh
index fd2ecd0e2b..fc1ccca7e4 100755
--- a/taskcluster/scripts/builder/build-android.sh
+++ b/taskcluster/scripts/builder/build-android.sh
@@ -19,7 +19,7 @@ ac_add_options --without-google-safebrowsing-api-keyfile
 ac_add_options --disable-nodejs
 unset NODEJS
 
-export GRADLE_MAVEN_REPOSITORIES="file://$MOZ_FETCHES_DIR/geckoview","file://$MOZ_FETCHES_DIR/android-gradle-dependencies/mozilla","file://$MOZ_FETCHES_DIR/android-gradle-dependencies/google","file://$MOZ_FETCHES_DIR/android-gradle-dependencies/central","file://$MOZ_FETCHES_DIR/android-gradle-dependencies/gradle-plugins","file:///$MOZ_FETCHES_DIR/plugins.gradle.org/m2"
+export GRADLE_MAVEN_REPOSITORIES="file://$MOZ_FETCHES_DIR/geckoview","file://$MOZ_FETCHES_DIR/android-gradle-dependencies/mozilla","file://$MOZ_FETCHES_DIR/android-gradle-dependencies/google","file://$MOZ_FETCHES_DIR/android-gradle-dependencies/central","file://$MOZ_FETCHES_DIR/android-gradle-dependencies/gradle-plugins","file:///$MOZ_FETCHES_DIR/android-gradle-dependencies/plugins.gradle.org/m2"
 EOF
 export MOZCONFIG=$mozconfig
 GRADLE=$MOZ_FETCHES_DIR/android-gradle-dependencies/gradle-dist/bin/gradle
diff --git a/taskcluster/scripts/lib/testrail_api.py b/taskcluster/scripts/lib/testrail_api.py
index 44474ebe9d..786ae8552c 100644
--- a/taskcluster/scripts/lib/testrail_api.py
+++ b/taskcluster/scripts/lib/testrail_api.py
@@ -37,82 +37,98 @@ from testrail_conn import APIClient
 
 class TestRail:
     def __init__(self, host, username, password):
+        if not all([host, username, password]):
+            raise ValueError("TestRail host, username, and password must be provided.")
         self.client = APIClient(host)
         self.client.user = username
         self.client.password = password
 
     # Public Methods
 
-    def create_milestone(self, testrail_project_id, title, description):
+    def create_milestone(self, project_id, title, description):
+        if not all([project_id, title, description]):
+            raise ValueError("Project ID, title, and description must be provided.")
         data = {"name": title, "description": description}
-        return self.client.send_post(f"add_milestone/{testrail_project_id}", data)
-
-    def create_milestone_and_test_runs(
-        self, project_id, milestone_name, milestone_description, devices, test_suite_id
-    ):
-        # Create milestone
-        milestone_id = self._retry_api_call(
-            self.create_milestone, project_id, milestone_name, milestone_description
-        )["id"]
-
-        # Create test runs for each device
-        for device in devices:
-            test_run_id = self._retry_api_call(
-                self.create_test_run, project_id, milestone_id, device, test_suite_id
-            )["id"]
-            self._retry_api_call(
-                self.update_test_cases_to_passed, project_id, test_run_id, test_suite_id
-            )
-
-        return milestone_id
+        return self.client.send_post(f"add_milestone/{project_id}", data)
 
     def create_test_run(
-        self, testrail_project_id, testrail_milestone_id, name_run, testrail_suite_id
+        self,
+        project_id,
+        milestone_id,
+        test_run_name,
+        suite_id,
     ):
+        if not all([project_id, milestone_id, test_run_name, suite_id]):
+            raise ValueError(
+                "Project ID, milestone ID, test run name, and suite ID must be provided."
+            )
         data = {
-            "name": name_run,
-            "milestone_id": testrail_milestone_id,
-            "suite_id": testrail_suite_id,
+            "name": test_run_name,
+            "milestone_id": milestone_id,
+            "suite_id": suite_id,
         }
-        return self.client.send_post(f"add_run/{testrail_project_id}", data)
-
-    def does_milestone_exist(self, testrail_project_id, milestone_name):
-        num_of_milestones_to_check = 10  # check last 10 milestones
-        milestones = self._get_milestones(
-            testrail_project_id
-        )  # returns reverse chronological order
-        for milestone in milestones[
-            -num_of_milestones_to_check:
-        ]:  # check last 10 api responses
-            if milestone_name == milestone["name"]:
-                return True
-        return False
-
-    def update_test_cases_to_passed(
-        self, testrail_project_id, testrail_run_id, testrail_suite_id
-    ):
-        test_cases = self._get_test_cases(testrail_project_id, testrail_suite_id)
+        return self.client.send_post(f"add_run/{project_id}", data)
+
+    def does_milestone_exist(self, project_id, milestone_name, num_of_milestones=10):
+        if not all([project_id, milestone_name]):
+            raise ValueError("Project ID and milestone name must be provided.")
+        # returns reverse chronological order of milestones, check last 10 milestones
+        milestones = self._get_milestones(project_id)[-num_of_milestones:]
+        return any(milestone_name == milestone["name"] for milestone in milestones)
+
+    def update_test_run_tests(self, test_run_id, test_status):
+        if not all([test_run_id, test_status]):
+            raise ValueError("Test run ID and test status must be provided.")
+        tests = self._get_tests(test_run_id)
         data = {
             "results": [
-                {"case_id": test_case["id"], "status_id": 1} for test_case in test_cases
+                {"test_id": test["id"], "status_id": test_status} for test in tests
             ]
         }
-        return self._update_test_run_results(testrail_run_id, data)
+        return self.client.send_post(f"add_results/{test_run_id}", data)
 
     # Private Methods
 
-    def _get_test_cases(self, testrail_project_id, testrail_test_suite_id):
-        return self.client.send_get(
-            f"get_cases/{testrail_project_id}&suite_id={testrail_test_suite_id}"
-        )
-
-    def _update_test_run_results(self, testrail_run_id, data):
-        return self.client.send_post(f"add_results_for_cases/{testrail_run_id}", data)
-
-    def _get_milestones(self, testrail_project_id):
-        return self.client.send_get(f"get_milestones/{testrail_project_id}")
+    def _get_test_cases(self, project_id, suite_id):
+        if not all([project_id, suite_id]):
+            raise ValueError("Project ID and suite ID must be provided.")
+        return self.client.send_get(f"get_cases/{project_id}&suite_id={suite_id}")[
+            "cases"
+        ]
+
+    def _get_milestone(self, milestone_id):
+        if not milestone_id:
+            raise ValueError("Milestone ID must be provided.")
+        return self.client.send_get(f"get_milestone/{milestone_id}")
+
+    def _get_milestones(self, project_id):
+        if not project_id:
+            raise ValueError("Project ID must be provided.")
+        return self.client.send_get(f"get_milestones/{project_id}")["milestones"]
+
+    def _get_tests(self, test_run_id):
+        if not test_run_id:
+            raise ValueError("Test run ID must be provided.")
+        return self.client.send_get(f"get_tests/{test_run_id}")["tests"]
+
+    def _get_test_run(self, test_run_id):
+        if not test_run_id:
+            raise ValueError("Test run ID must be provided.")
+        return self.client.send_get(f"get_run/{test_run_id}")
+
+    def _get_test_runs(self, project_id):
+        if not project_id:
+            raise ValueError("Project ID must be provided.")
+        return self.client.send_get(f"get_runs/{project_id}")["runs"]
+
+    def _get_test_run_results(self, test_run_id):
+        if not test_run_id:
+            raise ValueError("Test run ID must be provided.")
+        return self.client.send_get(f"get_results_for_run/{test_run_id}")["results"]
 
     def _retry_api_call(self, api_call, *args, max_retries=3, delay=5):
+        if not all([api_call, args]):
+            raise ValueError("API call and arguments must be provided.")
         """
         Retries the given API call up to max_retries times with a delay between attempts.
 
diff --git a/taskcluster/scripts/misc/afl-nyx.patch b/taskcluster/scripts/misc/afl-nyx.patch
index 94a1bbb31d..7a8a55b975 100644
--- a/taskcluster/scripts/misc/afl-nyx.patch
+++ b/taskcluster/scripts/misc/afl-nyx.patch
@@ -17,6 +17,12 @@ index 988e536e..5e9870c0 100644
  
  /* Do not change this unless you really know what you are doing. */
 
+commit e46fac6063f7b0b6eca8e140b10c3a107deb0a0f
+Author: Christian Holler (:decoder) <choller@mozilla.com>
+Date:   Wed Mar 6 10:19:52 2024 +0100
+
+    Fix delayed pcmap writing for code coverage with pc-table
+
 diff --git a/instrumentation/afl-compiler-rt.o.c b/instrumentation/afl-compiler-rt.o.c
 index caa3c3a8..76ceb451 100644
 --- a/instrumentation/afl-compiler-rt.o.c
@@ -51,3 +57,26 @@ index caa3c3a8..76ceb451 100644
 +    }
 
      if (__afl_debug) {
+
+commit 58206a3180479416e14ea324607be71ee69caa6f
+Author: Jesse Schwartzentruber <truber@mozilla.com>
+Date:   Wed Apr 17 14:40:41 2024 -0400
+
+    Set explicit visibility on shared memory variables.
+
+diff --git a/src/afl-cc.c b/src/afl-cc.c
+index dd4fb4ea..57089ae0 100644
+--- a/src/afl-cc.c
++++ b/src/afl-cc.c
+@@ -1591,8 +1591,10 @@ void add_defs_persistent_mode(aflcc_state_t *aflcc) {
+   insert_param(aflcc,
+                "-D__AFL_FUZZ_INIT()="
+                "int __afl_sharedmem_fuzzing = 1;"
+-               "extern unsigned int *__afl_fuzz_len;"
+-               "extern unsigned char *__afl_fuzz_ptr;"
++               "extern __attribute__((visibility(\"default\"))) "
++               "unsigned int *__afl_fuzz_len;"
++               "extern __attribute__((visibility(\"default\"))) "
++               "unsigned char *__afl_fuzz_ptr;"
+                "unsigned char __afl_fuzz_alt[1048576];"
+                "unsigned char *__afl_fuzz_alt_ptr = __afl_fuzz_alt;");
diff --git a/taskcluster/scripts/misc/android-gradle-dependencies/after.sh b/taskcluster/scripts/misc/android-gradle-dependencies/after.sh
index 9943cf2c41..22be14256e 100755
--- a/taskcluster/scripts/misc/android-gradle-dependencies/after.sh
+++ b/taskcluster/scripts/misc/android-gradle-dependencies/after.sh
@@ -10,7 +10,7 @@ set -v
 
 # Package everything up.
 pushd $WORKSPACE
-mkdir -p android-gradle-dependencies /builds/worker/artifacts
+mkdir -p /builds/worker/artifacts
 
 # NEXUS_WORK is exported by `before.sh`.
 cp -R ${NEXUS_WORK}/storage/mozilla android-gradle-dependencies
diff --git a/taskcluster/scripts/misc/android-gradle-dependencies/before.sh b/taskcluster/scripts/misc/android-gradle-dependencies/before.sh
index 7150731d73..3d1b5809b2 100755
--- a/taskcluster/scripts/misc/android-gradle-dependencies/before.sh
+++ b/taskcluster/scripts/misc/android-gradle-dependencies/before.sh
@@ -4,14 +4,30 @@ set -x -e
 
 echo "running as" $(id)
 
-: WORKSPACE ${WORKSPACE:=/builds/worker/workspace}
+if [[ -z "${WORKSPACE}" ]]; then
+  export WORKSPACE=/builds/worker/workspace
+fi
 
 set -v
 
+# Download the gradle-python-envs plugin
+# See https://github.com/gradle/plugin-portal-requests/issues/164
+pushd ${WORKSPACE}
+mkdir -p android-gradle-dependencies
+pushd android-gradle-dependencies
+
+PYTHON_ENVS_VERSION="0.0.31"
+
+PYTHON_ENVS_BASE_URL=https://plugins.gradle.org/m2/gradle/plugin/com/jetbrains/python/gradle-python-envs
+
+wget --no-parent --recursive --execute robots=off "${PYTHON_ENVS_BASE_URL}/${PYTHON_ENVS_VERSION}/"
+popd
+popd
+
 # Export NEXUS_WORK so that `after.sh` can use it.
-export NEXUS_WORK=/builds/worker/workspace/sonatype-nexus-work
+export NEXUS_WORK=${WORKSPACE}/sonatype-nexus-work
 mkdir -p ${NEXUS_WORK}/conf
-cp /builds/worker/workspace/build/src/taskcluster/scripts/misc/android-gradle-dependencies/nexus.xml ${NEXUS_WORK}/conf/nexus.xml
+cp ${WORKSPACE}/build/src/taskcluster/scripts/misc/android-gradle-dependencies/nexus.xml ${NEXUS_WORK}/conf/nexus.xml
 
 RUN_AS_USER=worker $MOZ_FETCHES_DIR/sonatype-nexus/bin/nexus restart
 
diff --git a/taskcluster/scripts/misc/cctools.patch b/taskcluster/scripts/misc/cctools.patch
index 8e11708465..65e10437dd 100644
--- a/taskcluster/scripts/misc/cctools.patch
+++ b/taskcluster/scripts/misc/cctools.patch
@@ -15,3 +15,17 @@ index bfb67a3..d5b1c67 100644
  				_deadStripRoots.insert(atom);
  			}
  		}
+diff --git a/cctools/ld64/src/ld/code-sign-blobs/blob.h b/cctools/ld64/src/ld/code-sign-blobs/blob.h
+index 54afb2d..c17d19b 100644
+--- a/cctools/ld64/src/ld/code-sign-blobs/blob.h
++++ b/cctools/ld64/src/ld/code-sign-blobs/blob.h
+@@ -181,9 +181,6 @@ public:
+ 		return NULL;
+ 	}
+ 	
+-	BlobType *clone() const
+-	{ assert(validateBlob()); return specific(this->BlobCore::clone());	}
+-
+ 	static BlobType *readBlob(int fd)
+ 	{ return specific(BlobCore::readBlob(fd, _magic, sizeof(BlobType), 0), true); }
+ 
diff --git a/taskcluster/scripts/misc/fetch-chromium.py b/taskcluster/scripts/misc/fetch-chromium.py
index ab00dac863..89b476a5a3 100644
--- a/taskcluster/scripts/misc/fetch-chromium.py
+++ b/taskcluster/scripts/misc/fetch-chromium.py
@@ -38,30 +38,35 @@ CHROMIUM_INFO = {
     "linux": {
         "platform": "Linux_x64",
         "chromium": "chrome-linux.zip",
+        "dir": "chrome-linux",
         "result": "chromium-linux.tar.bz2",
         "chromedriver": "chromedriver_linux64.zip",
     },
     "win32": {
         "platform": "Win",
         "chromium": "chrome-win.zip",
+        "dir": "chrome-win",
         "result": "chromium-win32.tar.bz2",
         "chromedriver": "chromedriver_win32.zip",
     },
     "win64": {
         "platform": "Win",
         "chromium": "chrome-win.zip",
+        "dir": "chrome-win",
         "result": "chromium-win64.tar.bz2",
         "chromedriver": "chromedriver_win32.zip",
     },
     "mac": {
         "platform": "Mac",
         "chromium": "chrome-mac.zip",
+        "dir": "chrome-mac",
         "result": "chromium-mac.tar.bz2",
         "chromedriver": "chromedriver_mac64.zip",
     },
     "mac-arm": {
         "platform": "Mac_Arm",
         "chromium": "chrome-mac.zip",
+        "dir": "chrome-mac",
         "result": "chromium-mac-arm.tar.bz2",
         "chromedriver": "chromedriver_mac64.zip",
     },
@@ -108,24 +113,11 @@ def fetch_chromium_revision(platform):
     return chromium_revision.strip()
 
 
-def fetch_chromium_build(platform, revision, zippath):
-    """Download a chromium build for a given revision, or the latest."""
+def fetch_chromedriver(platform, revision, chromium_dir):
+    """Get the chromedriver for the given revision and repackage it."""
     if not revision:
         revision = fetch_chromium_revision(platform)
 
-    download_platform = CHROMIUM_INFO[platform]["platform"]
-    download_url = CHROMIUM_BASE_URL.format(
-        download_platform, revision, CHROMIUM_INFO[platform]["chromium"]
-    )
-
-    log("Downloading %s chromium build revision %s..." % (download_platform, revision))
-    log(download_url)
-    fetch_file(download_url, zippath)
-    return revision
-
-
-def fetch_chromedriver(platform, revision, chromium_dir):
-    """Get the chromedriver for the given revision and repackage it."""
     download_url = CHROMIUM_BASE_URL.format(
         CHROMIUM_INFO[platform]["platform"],
         revision,
@@ -152,6 +144,7 @@ def fetch_chromedriver(platform, revision, chromium_dir):
         raise Exception("Could not find chromedriver binary in %s" % tmppath)
     log("Copying chromedriver from: %s to: %s" % (cd_path, chromium_dir))
     shutil.copy(cd_path, chromium_dir)
+    return revision
 
 
 def build_chromium_archive(platform, revision=None):
@@ -173,39 +166,20 @@ def build_chromium_archive(platform, revision=None):
 
     # Make a temporary location for the file
     tmppath = tempfile.mkdtemp()
-    tmpzip = os.path.join(tmppath, "tmp-chromium.zip")
 
-    revision = fetch_chromium_build(platform, revision, tmpzip)
+    # Create the directory format expected for browsertime setup in taskgraph transform
+    artifact_dir = CHROMIUM_INFO[platform]["dir"]
+    chromium_dir = os.path.join(tmppath, artifact_dir)
+    os.mkdir(chromium_dir)
 
-    # Unpack archive in `tmpzip` to store the revision number and
-    # the chromedriver
-    unzip(tmpzip, tmppath)
-
-    dirs = [
-        d
-        for d in os.listdir(tmppath)
-        if os.path.isdir(os.path.join(tmppath, d)) and d.startswith("chrome-")
-    ]
-
-    if len(dirs) > 1:
-        raise Exception(
-            "Too many directories starting with `chrome-` after extracting."
-        )
-    elif len(dirs) == 0:
-        raise Exception(
-            "Could not find any directories after extraction of chromium zip."
-        )
-
-    chromium_dir = os.path.join(tmppath, dirs[0])
+    # Store the revision number and chromedriver
+    revision = fetch_chromedriver(platform, revision, chromium_dir)
     revision_file = os.path.join(chromium_dir, ".REVISION")
     with open(revision_file, "w+") as f:
         f.write(str(revision))
 
-    # Get and store the chromedriver
-    fetch_chromedriver(platform, revision, chromium_dir)
-
     tar_file = CHROMIUM_INFO[platform]["result"]
-    tar_command = ["tar", "cjf", tar_file, "-C", tmppath, dirs[0]]
+    tar_command = ["tar", "cjf", tar_file, "-C", tmppath, artifact_dir]
     log("Added revision to %s file." % revision_file)
 
     log("Tarring with the command: %s" % str(tar_command))
diff --git a/taskcluster/scripts/misc/gradle-python-envs.sh b/taskcluster/scripts/misc/gradle-python-envs.sh
deleted file mode 100755
index 5873e3fa91..0000000000
--- a/taskcluster/scripts/misc/gradle-python-envs.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/sh
-
-set -x -e -v
-
-VERSION="$1"
-
-BASE_URL=https://plugins.gradle.org/m2/gradle/plugin/com/jetbrains/python/gradle-python-envs
-
-mkdir -p "${UPLOAD_DIR}"
-wget --no-parent --recursive --execute robots=off "${BASE_URL}/${VERSION}/"
-tar caf "${UPLOAD_DIR}/gradle-python-envs-${VERSION}.tar.zst" plugins.gradle.org
diff --git a/taskcluster/scripts/misc/wasi-sdk.patch b/taskcluster/scripts/misc/wasi-sdk.patch
index b9e26074d1..d151e5ae37 100644
--- a/taskcluster/scripts/misc/wasi-sdk.patch
+++ b/taskcluster/scripts/misc/wasi-sdk.patch
@@ -21,10 +21,10 @@ index d2ccff6..95f395b 100644
      -DUNIX:BOOL=ON \
      --debug-trycompile
 diff --git a/src/wasi-libc/Makefile b/src/wasi-libc/Makefile
-index f350ecb..9a5c940 100644
+index f350ecb..3b73115 100644
 --- a/src/wasi-libc/Makefile
 +++ b/src/wasi-libc/Makefile
-@@ -308,7 +308,7 @@ ASMFLAGS += --target=$(TARGET_TRIPLE)
+@@ -305,7 +305,7 @@ ASMFLAGS += --target=$(TARGET_TRIPLE)
  # TODO: Add -fno-signaling-nans when the compiler supports it.
  CFLAGS += -fno-trapping-math
  # Add all warnings, but disable a few which occur in third-party code.
@@ -33,23 +33,49 @@ index f350ecb..9a5c940 100644
    -Wno-null-pointer-arithmetic \
    -Wno-unused-parameter \
    -Wno-sign-compare \
-@@ -671,6 +671,9 @@ check-symbols: startup_files libc
+@@ -639,7 +639,7 @@ check-symbols: startup_files libc
+ 	for undef_sym in $$("$(NM)" --undefined-only "$(SYSROOT_LIB)"/libc.a "$(SYSROOT_LIB)"/libc-*.a "$(SYSROOT_LIB)"/*.o \
+ 	    |grep ' U ' |sed 's/.* U //' |LC_ALL=C sort |uniq); do \
+ 	    grep -q '\<'$$undef_sym'\>' "$(DEFINED_SYMBOLS)" || echo $$undef_sym; \
+-	done | grep -v "^__mul" > "$(UNDEFINED_SYMBOLS)"
++	done | grep -E -v "^__mul|__indirect_function_table" > "$(UNDEFINED_SYMBOLS)"
+ 	grep '^_*imported_wasi_' "$(UNDEFINED_SYMBOLS)" \
+ 	    > "$(SYSROOT_LIB)/libc.imports"
+ 
+@@ -671,10 +671,16 @@ check-symbols: startup_files libc
  	@#
  	@# TODO: Filter out __NO_MATH_ERRNO_ and a few __*WIDTH__ that are new to clang 14.
  	@# TODO: Filter out __GCC_HAVE_SYNC_COMPARE_AND_SWAP_* that are new to clang 16.
 +	@# TODO: Filter out __FPCLASS_* that are new to clang 17.
 +	@# TODO: Filter out __FLT128_* that are new to clang 18.
 +	@# TODO: Filter out __MEMORY_SCOPE_* that are new to clang 18.
++	@# TODO: Filter out __GCC_(CON|DE)STRUCTIVE_SIZE that are new to clang 19.
  	@# TODO: clang defined __FLT_EVAL_METHOD__ until clang 15, so we force-undefine it
  	@# for older versions.
  	@# TODO: Undefine __wasm_mutable_globals__ and __wasm_sign_ext__, that are new to
-@@ -702,6 +703,9 @@ check-symbols: startup_files libc
+ 	@# clang 16 for -mcpu=generic.
++	@# TODO: Undefine __wasm_multivalue__ and __wasm_reference_types__, that are new to
++	@# clang 19 for -mcpu=generic.
+ 	@# TODO: As of clang 16, __GNUC_VA_LIST is #defined without a value.
+ 	$(CC) $(CFLAGS) "$(SYSROOT_SHARE)/include-all.c" \
+ 	    -isystem $(SYSROOT_INC) \
+@@ -691,6 +697,8 @@ check-symbols: startup_files libc
+ 	    -U__clang_wide_literal_encoding__ \
+ 	    -U__wasm_mutable_globals__ \
+ 	    -U__wasm_sign_ext__ \
++	    -U__wasm_multivalue__ \
++	    -U__wasm_reference_types__ \
+ 	    -U__GNUC__ \
+ 	    -U__GNUC_MINOR__ \
+ 	    -U__GNUC_PATCHLEVEL__ \
+@@ -702,6 +710,10 @@ check-symbols: startup_files libc
  	    | sed -e 's/__GNUC_VA_LIST $$/__GNUC_VA_LIST 1/' \
  	    | grep -v '^#define __\(BOOL\|INT_\(LEAST\|FAST\)\(8\|16\|32\|64\)\|INT\|LONG\|LLONG\|SHRT\)_WIDTH__' \
  	    | grep -v '^#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_\(1\|2\|4\|8\)' \
 +	    | grep -v '^#define __FPCLASS_' \
 +	    | grep -v '^#define __FLT128_' \
 +	    | grep -v '^#define __MEMORY_SCOPE_' \
++	    | grep -v '^#define __GCC_\(CON\|DE\)STRUCTIVE_SIZE' \
  	    > "$(SYSROOT_SHARE)/predefined-macros.txt"
  
  	# Check that the computed metadata matches the expected metadata.
diff --git a/taskcluster/scripts/testrail_main.py b/taskcluster/scripts/testrail_main.py
index 19bb2f41ea..c8221a73b9 100644
--- a/taskcluster/scripts/testrail_main.py
+++ b/taskcluster/scripts/testrail_main.py
@@ -73,14 +73,15 @@ def main():
 
         # Create milestone and test runs
         devices = ["Google Pixel 3(Android11)", "Google Pixel 2(Android11)"]
-        testrail.create_milestone_and_test_runs(
-            testrail_project_id,
-            milestone_name,
-            milestone_description,
-            devices,
-            testrail_test_suite_id,
+        milestone = testrail.create_milestone(
+            testrail_project_id, milestone_name, milestone_description
         )
 
+        for device in devices:
+            test_run = testrail.create_test_run(
+                testrail_project_id, milestone["id"], device, testrail_test_suite_id
+            )
+            testrail.update_test_run_tests(test_run["id"], 1)  # 1 = Passed
         # Send success notification
         success_values = {
             "RELEASE_TYPE": release_type,
diff --git a/taskcluster/scripts/tests/test-lab.py b/taskcluster/scripts/tests/test-lab.py
index b8b812df89..7c626f8359 100644
--- a/taskcluster/scripts/tests/test-lab.py
+++ b/taskcluster/scripts/tests/test-lab.py
@@ -21,6 +21,7 @@ import sys
 from enum import Enum
 from pathlib import Path
 from typing import List, Optional, Union
+from urllib.parse import urlparse
 
 
 # Worker paths and binaries
@@ -116,10 +117,18 @@ def execute_tests(
         Worker.RESULTS_DIR.value,
         "--project",
         os.environ.get("GOOGLE_PROJECT"),
-        "--client-details",
-        f'matrixLabel={os.environ.get("PULL_REQUEST_NUMBER", "None")}',
     ]
 
+    # Add a client details parameter using the repository name
+    matrixLabel = os.environ.get("GECKO_HEAD_REPOSITORY")
+    if matrixLabel is not None:
+        flank_command.extend(
+            [
+                "--client-details",
+                f"matrixLabel={urlparse(matrixLabel).path.rpartition('/')[-1]}",
+            ]
+        )
+
     # Add androidTest APK if provided (optional) as robo test or instrumentation test
     if apk_test:
         flank_command.extend(["--test", str(apk_test)])
diff --git a/taskcluster/test/conftest.py b/taskcluster/test/conftest.py
index 0123cee2de..224d5fb777 100644
--- a/taskcluster/test/conftest.py
+++ b/taskcluster/test/conftest.py
@@ -45,10 +45,10 @@ def create_tgg(responses, datadir):
         mock_requests[url] = "bugbug-push-schedules.json"
 
         # files changed
-        url = "{head_repository}/json-automationrelevance/{head_rev}".format(
+        url = "{head_repository}/json-pushfileschanged/{head_rev}".format(
             **tgg.parameters
         )
-        mock_requests[url] = "automationrelevance.json"
+        mock_requests[url] = "pushfileschanged.json"
 
         url = PUSHLOG_PUSHES_TMPL.format(
             repository=tgg.parameters["head_repository"],
diff --git a/taskcluster/test/data/automationrelevance.json b/taskcluster/test/data/automationrelevance.json
deleted file mode 100644
index 36289ded18..0000000000
--- a/taskcluster/test/data/automationrelevance.json
+++ /dev/null
@@ -1,169 +0,0 @@
-{
-  "changesets": [
-    {
-      "author": "User \u003cuser@example.com\u003e",
-      "backsoutnodes": [],
-      "bugs": [
-        {
-          "no": "1646582",
-          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1646582"
-        }
-      ],
-      "date": [1593028650.0, 0],
-      "desc": "Bug 1646582 - Remove nsIRemoteWebProgressRequest since it's not being used anywhere. r=barret\n\nDifferential Revision: https://phabricator.services.mozilla.com/D80127",
-      "extra": { "branch": "default", "moz-landing-system": "lando" },
-      "files": [
-        "dom/ipc/BrowserChild.cpp",
-        "dom/ipc/BrowserParent.cpp",
-        "dom/ipc/PBrowser.ipdl",
-        "dom/ipc/RemoteWebProgressRequest.cpp",
-        "dom/ipc/RemoteWebProgressRequest.h",
-        "dom/ipc/components.conf",
-        "dom/ipc/moz.build",
-        "dom/ipc/nsIRemoteWebProgressRequest.idl",
-        "dom/ipc/tests/browser.ini",
-        "dom/ipc/tests/browser_ElapsedTime.js",
-        "dom/ipc/tests/elapsed_time.sjs"
-      ],
-      "landingsystem": "lando",
-      "node": "9fc2e30af2852cbacf039e6b7cc36a0233c8ed4e",
-      "parents": ["226b1c518cba596226c80e4475a60ac3a0bfd198"],
-      "perfherderurl": "https://treeherder.mozilla.org/perf.html#/compare?originalProject=autoland&originalRevision=47d0de3f55cd0fcb345d4fa9a5a7d23891315182&newProject=autoland&newRevision=9fc2e30af2852cbacf039e6b7cc36a0233c8ed4e",
-      "phase": "public",
-      "pushdate": [1593029535, 0],
-      "pushhead": "47d0de3f55cd0fcb345d4fa9a5a7d23891315182",
-      "pushid": 119873,
-      "pushuser": "user@example.com",
-      "rev": 537254,
-      "reviewers": [{ "name": "barret", "revset": "reviewer(barret)" }],
-      "treeherderrepo": "autoland",
-      "treeherderrepourl": "https://treeherder.mozilla.org/#/jobs?repo=autoland"
-    },
-    {
-      "author": "User \u003cuser@example.com\u003e",
-      "backsoutnodes": [],
-      "bugs": [
-        {
-          "no": "1646582",
-          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1646582"
-        }
-      ],
-      "date": [1593028695.0, 0],
-      "desc": "Bug 1646582 - Remove DOM(Inner)WindowID from nsIWebProgress. r=nika\n\nDifferential Revision: https://phabricator.services.mozilla.com/D80128",
-      "extra": { "branch": "default", "moz-landing-system": "lando" },
-      "files": [
-        "docshell/base/BrowsingContextWebProgress.cpp",
-        "dom/ipc/BrowserChild.cpp",
-        "dom/ipc/BrowserParent.cpp",
-        "dom/ipc/PBrowser.ipdl",
-        "dom/ipc/RemoteWebProgress.cpp",
-        "dom/ipc/RemoteWebProgress.h",
-        "dom/ipc/WindowGlobalParent.cpp",
-        "dom/ipc/nsIRemoteWebProgress.idl",
-        "toolkit/components/sessionstore/SessionStoreListener.cpp",
-        "toolkit/components/statusfilter/nsBrowserStatusFilter.cpp",
-        "uriloader/base/nsDocLoader.cpp",
-        "uriloader/base/nsIWebProgress.idl"
-      ],
-      "landingsystem": "lando",
-      "node": "1a749d5aaa71752a9f1d8296b7c32a2a30bccc84",
-      "parents": ["9fc2e30af2852cbacf039e6b7cc36a0233c8ed4e"],
-      "perfherderurl": "https://treeherder.mozilla.org/perf.html#/compare?originalProject=autoland&originalRevision=47d0de3f55cd0fcb345d4fa9a5a7d23891315182&newProject=autoland&newRevision=9fc2e30af2852cbacf039e6b7cc36a0233c8ed4e",
-      "phase": "public",
-      "pushdate": [1593029535, 0],
-      "pushhead": "47d0de3f55cd0fcb345d4fa9a5a7d23891315182",
-      "pushid": 119873,
-      "pushuser": "user@example.com",
-      "rev": 537255,
-      "reviewers": [{ "name": "nika", "revset": "reviewer(nika)" }],
-      "treeherderrepo": "autoland",
-      "treeherderrepourl": "https://treeherder.mozilla.org/#/jobs?repo=autoland"
-    },
-    {
-      "author": "User \u003cuser@example.com\u003e",
-      "backsoutnodes": [],
-      "bugs": [
-        {
-          "no": "1646582",
-          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1646582"
-        }
-      ],
-      "date": [1593028744.0, 0],
-      "desc": "Bug 1646582 - Remove RemoteWebProgressManager. r=nika,Gijs\n\nDifferential Revision: https://phabricator.services.mozilla.com/D80129",
-      "extra": { "branch": "default", "moz-landing-system": "lando" },
-      "files": [
-        "devtools/client/responsive/browser/swap.js",
-        "dom/interfaces/base/nsIBrowser.idl",
-        "dom/ipc/BrowserParent.cpp",
-        "dom/ipc/BrowserParent.h",
-        "dom/ipc/RemoteWebProgress.cpp",
-        "dom/ipc/RemoteWebProgress.h",
-        "dom/ipc/WindowGlobalParent.cpp",
-        "dom/ipc/components.conf",
-        "dom/ipc/moz.build",
-        "dom/ipc/nsIRemoteWebProgress.idl",
-        "netwerk/ipc/DocumentLoadListener.cpp",
-        "netwerk/ipc/DocumentLoadListener.h",
-        "security/manager/ssl/nsSecureBrowserUI.cpp",
-        "toolkit/content/widgets/browser-custom-element.js",
-        "toolkit/modules/RemoteWebProgress.jsm",
-        "toolkit/modules/moz.build",
-        "tools/lint/eslint/modules.json"
-      ],
-      "landingsystem": "lando",
-      "node": "14b9b4515aabcb9060ece1a988c7993ef65a0bdc",
-      "parents": ["1a749d5aaa71752a9f1d8296b7c32a2a30bccc84"],
-      "perfherderurl": "https://treeherder.mozilla.org/perf.html#/compare?originalProject=autoland&originalRevision=47d0de3f55cd0fcb345d4fa9a5a7d23891315182&newProject=autoland&newRevision=9fc2e30af2852cbacf039e6b7cc36a0233c8ed4e",
-      "phase": "public",
-      "pushdate": [1593029535, 0],
-      "pushhead": "47d0de3f55cd0fcb345d4fa9a5a7d23891315182",
-      "pushid": 119873,
-      "pushuser": "user@example.com",
-      "rev": 537256,
-      "reviewers": [
-        { "name": "nika", "revset": "reviewer(nika)" },
-        { "name": "Gijs", "revset": "reviewer(Gijs)" }
-      ],
-      "treeherderrepo": "autoland",
-      "treeherderrepourl": "https://treeherder.mozilla.org/#/jobs?repo=autoland"
-    },
-    {
-      "author": "User \u003cuser@example.com\u003e",
-      "backsoutnodes": [],
-      "bugs": [
-        {
-          "no": "1646582",
-          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1646582"
-        }
-      ],
-      "date": [1593028772.0, 0],
-      "desc": "Bug 1646582 - Pull the inner window id from the WindowGlobalParent, rather than passing it across PBrowser for updateForLocationChange. r=nika,Gijs\n\nDifferential Revision: https://phabricator.services.mozilla.com/D80131",
-      "extra": { "branch": "default", "moz-landing-system": "lando" },
-      "files": [
-        "devtools/client/responsive/browser/tunnel.js",
-        "dom/interfaces/base/nsIBrowser.idl",
-        "dom/ipc/BrowserChild.cpp",
-        "dom/ipc/BrowserParent.cpp",
-        "dom/ipc/PBrowser.ipdl",
-        "toolkit/content/widgets/browser-custom-element.js"
-      ],
-      "landingsystem": "lando",
-      "node": "47d0de3f55cd0fcb345d4fa9a5a7d23891315182",
-      "parents": ["14b9b4515aabcb9060ece1a988c7993ef65a0bdc"],
-      "perfherderurl": "https://treeherder.mozilla.org/perf.html#/compare?originalProject=autoland&originalRevision=47d0de3f55cd0fcb345d4fa9a5a7d23891315182&newProject=autoland&newRevision=9fc2e30af2852cbacf039e6b7cc36a0233c8ed4e",
-      "phase": "public",
-      "pushdate": [1593029535, 0],
-      "pushhead": "47d0de3f55cd0fcb345d4fa9a5a7d23891315182",
-      "pushid": 119873,
-      "pushuser": "user@example.com",
-      "rev": 537257,
-      "reviewers": [
-        { "name": "nika", "revset": "reviewer(nika)" },
-        { "name": "Gijs", "revset": "reviewer(Gijs)" }
-      ],
-      "treeherderrepo": "autoland",
-      "treeherderrepourl": "https://treeherder.mozilla.org/#/jobs?repo=autoland"
-    }
-  ],
-  "visible": true
-}
diff --git a/taskcluster/test/data/pushfileschanged.json b/taskcluster/test/data/pushfileschanged.json
new file mode 100644
index 0000000000..830aa1c80a
--- /dev/null
+++ b/taskcluster/test/data/pushfileschanged.json
@@ -0,0 +1,25 @@
+{
+  "files": [
+    "devtools/client/responsive/browser/swap.js",
+    "devtools/client/responsive/browser/tunnel.js",
+    "docshell/base/BrowsingContextWebProgress.cpp",
+    "dom/ipc/BrowserChild.cpp",
+    "dom/ipc/BrowserParent.cpp",
+    "dom/ipc/PBrowser.ipdl",
+    "dom/ipc/RemoteWebProgressRequest.cpp",
+    "dom/ipc/RemoteWebProgressRequest.h",
+    "dom/ipc/components.conf",
+    "dom/ipc/moz.build",
+    "dom/ipc/nsIRemoteWebProgressRequest.idl",
+    "dom/ipc/tests/browser.ini",
+    "dom/ipc/tests/browser_ElapsedTime.js",
+    "dom/ipc/tests/elapsed_time.sjs",
+    "netwerk/ipc/DocumentLoadListener.cpp",
+    "netwerk/ipc/DocumentLoadListener.h",
+    "security/manager/ssl/nsSecureBrowserUI.cpp",
+    "tools/lint/eslint/modules.json",
+    "toolkit/content/widgets/browser-custom-element.js",
+    "toolkit/modules/RemoteWebProgress.jsm",
+    "toolkit/modules/moz.build"
+  ]
+}
diff --git a/taskcluster/test/params/mb-promote-android.yml b/taskcluster/test/params/mb-promote-android.yml
index 90a8c1e602..b1fed85cb7 100644
--- a/taskcluster/test/params/mb-promote-android.yml
+++ b/taskcluster/test/params/mb-promote-android.yml
@@ -160,7 +160,6 @@ existing_tasks:
   docker-image-firefox-snap: elwDDkImTPaIJXsdkPOgHA
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: Cfu6AIh4REm_lP4w2WJ34A
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: H2NDEiu8RJWciIqy0yu0IA
diff --git a/taskcluster/test/params/mb-promote-devedition-partials.yml b/taskcluster/test/params/mb-promote-devedition-partials.yml
index 5517cf96ce..b70e622ad8 100644
--- a/taskcluster/test/params/mb-promote-devedition-partials.yml
+++ b/taskcluster/test/params/mb-promote-devedition-partials.yml
@@ -160,7 +160,6 @@ existing_tasks:
   docker-image-firefox-snap: elwDDkImTPaIJXsdkPOgHA
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: Cfu6AIh4REm_lP4w2WJ34A
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: H2NDEiu8RJWciIqy0yu0IA
diff --git a/taskcluster/test/params/mb-promote-devedition.yml b/taskcluster/test/params/mb-promote-devedition.yml
index 306c117f44..002cf55c73 100644
--- a/taskcluster/test/params/mb-promote-devedition.yml
+++ b/taskcluster/test/params/mb-promote-devedition.yml
@@ -160,7 +160,6 @@ existing_tasks:
   docker-image-firefox-snap: elwDDkImTPaIJXsdkPOgHA
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: Cfu6AIh4REm_lP4w2WJ34A
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: H2NDEiu8RJWciIqy0yu0IA
diff --git a/taskcluster/test/params/mb-promote-firefox-partials.yml b/taskcluster/test/params/mb-promote-firefox-partials.yml
index 39bcac3f87..2092b1e638 100644
--- a/taskcluster/test/params/mb-promote-firefox-partials.yml
+++ b/taskcluster/test/params/mb-promote-firefox-partials.yml
@@ -160,7 +160,6 @@ existing_tasks:
   docker-image-firefox-snap: elwDDkImTPaIJXsdkPOgHA
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: Cfu6AIh4REm_lP4w2WJ34A
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: H2NDEiu8RJWciIqy0yu0IA
diff --git a/taskcluster/test/params/mb-promote-firefox.yml b/taskcluster/test/params/mb-promote-firefox.yml
index 1fe4f69304..0c066c00f7 100644
--- a/taskcluster/test/params/mb-promote-firefox.yml
+++ b/taskcluster/test/params/mb-promote-firefox.yml
@@ -160,7 +160,6 @@ existing_tasks:
   docker-image-firefox-snap: elwDDkImTPaIJXsdkPOgHA
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: Cfu6AIh4REm_lP4w2WJ34A
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: H2NDEiu8RJWciIqy0yu0IA
diff --git a/taskcluster/test/params/mb-push-android.yml b/taskcluster/test/params/mb-push-android.yml
index 1acb1628ea..2f18c0f6f3 100644
--- a/taskcluster/test/params/mb-push-android.yml
+++ b/taskcluster/test/params/mb-push-android.yml
@@ -2405,7 +2405,6 @@ existing_tasks:
   docker-image-firefox-snap: elwDDkImTPaIJXsdkPOgHA
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: Cfu6AIh4REm_lP4w2WJ34A
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: H2NDEiu8RJWciIqy0yu0IA
diff --git a/taskcluster/test/params/mb-push-devedition.yml b/taskcluster/test/params/mb-push-devedition.yml
index 1952bac833..bed653b3a4 100644
--- a/taskcluster/test/params/mb-push-devedition.yml
+++ b/taskcluster/test/params/mb-push-devedition.yml
@@ -2405,7 +2405,6 @@ existing_tasks:
   docker-image-firefox-snap: elwDDkImTPaIJXsdkPOgHA
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: Cfu6AIh4REm_lP4w2WJ34A
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: H2NDEiu8RJWciIqy0yu0IA
diff --git a/taskcluster/test/params/mb-push-firefox-partials.yml b/taskcluster/test/params/mb-push-firefox-partials.yml
index 5fcf72ec14..a73885592c 100644
--- a/taskcluster/test/params/mb-push-firefox-partials.yml
+++ b/taskcluster/test/params/mb-push-firefox-partials.yml
@@ -2405,7 +2405,6 @@ existing_tasks:
   docker-image-firefox-snap: elwDDkImTPaIJXsdkPOgHA
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: Cfu6AIh4REm_lP4w2WJ34A
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: H2NDEiu8RJWciIqy0yu0IA
diff --git a/taskcluster/test/params/mb-push-firefox.yml b/taskcluster/test/params/mb-push-firefox.yml
index 78f4199b13..1db380ec51 100644
--- a/taskcluster/test/params/mb-push-firefox.yml
+++ b/taskcluster/test/params/mb-push-firefox.yml
@@ -2405,7 +2405,6 @@ existing_tasks:
   docker-image-firefox-snap: elwDDkImTPaIJXsdkPOgHA
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: Cfu6AIh4REm_lP4w2WJ34A
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: H2NDEiu8RJWciIqy0yu0IA
diff --git a/taskcluster/test/params/mb-ship-android.yml b/taskcluster/test/params/mb-ship-android.yml
index e2d19707e2..0dbdb029f2 100644
--- a/taskcluster/test/params/mb-ship-android.yml
+++ b/taskcluster/test/params/mb-ship-android.yml
@@ -147,7 +147,6 @@ existing_tasks:
   docker-image-firefox-snap: elwDDkImTPaIJXsdkPOgHA
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: Cfu6AIh4REm_lP4w2WJ34A
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: H2NDEiu8RJWciIqy0yu0IA
diff --git a/taskcluster/test/params/mb-ship-devedition.yml b/taskcluster/test/params/mb-ship-devedition.yml
index 08447d8139..35f8518268 100644
--- a/taskcluster/test/params/mb-ship-devedition.yml
+++ b/taskcluster/test/params/mb-ship-devedition.yml
@@ -147,7 +147,6 @@ existing_tasks:
   docker-image-firefox-snap: elwDDkImTPaIJXsdkPOgHA
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: Cfu6AIh4REm_lP4w2WJ34A
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: H2NDEiu8RJWciIqy0yu0IA
diff --git a/taskcluster/test/params/mb-ship-firefox-partials.yml b/taskcluster/test/params/mb-ship-firefox-partials.yml
index f1ad991f99..835fb532d9 100644
--- a/taskcluster/test/params/mb-ship-firefox-partials.yml
+++ b/taskcluster/test/params/mb-ship-firefox-partials.yml
@@ -147,7 +147,6 @@ existing_tasks:
   docker-image-firefox-snap: elwDDkImTPaIJXsdkPOgHA
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: Cfu6AIh4REm_lP4w2WJ34A
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: H2NDEiu8RJWciIqy0yu0IA
diff --git a/taskcluster/test/params/mb-ship-firefox.yml b/taskcluster/test/params/mb-ship-firefox.yml
index 4a5eb2161a..42778db539 100644
--- a/taskcluster/test/params/mb-ship-firefox.yml
+++ b/taskcluster/test/params/mb-ship-firefox.yml
@@ -147,7 +147,6 @@ existing_tasks:
   docker-image-firefox-snap: elwDDkImTPaIJXsdkPOgHA
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: Cfu6AIh4REm_lP4w2WJ34A
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: H2NDEiu8RJWciIqy0yu0IA
diff --git a/taskcluster/test/params/mc-android-nightly.yml b/taskcluster/test/params/mc-android-nightly.yml
index ea1b87a236..72cd724785 100644
--- a/taskcluster/test/params/mc-android-nightly.yml
+++ b/taskcluster/test/params/mc-android-nightly.yml
@@ -206,7 +206,6 @@ existing_tasks:
   docker-image-firefox-snap: elwDDkImTPaIJXsdkPOgHA
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: Cfu6AIh4REm_lP4w2WJ34A
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: UGlRm6fZSJOQc1JcPC23lw
diff --git a/taskcluster/test/params/mc-desktop-nightly.yml b/taskcluster/test/params/mc-desktop-nightly.yml
index 37d7f5de74..cadc2a8910 100644
--- a/taskcluster/test/params/mc-desktop-nightly.yml
+++ b/taskcluster/test/params/mc-desktop-nightly.yml
@@ -206,7 +206,6 @@ existing_tasks:
   docker-image-firefox-snap: elwDDkImTPaIJXsdkPOgHA
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: Cfu6AIh4REm_lP4w2WJ34A
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: UGlRm6fZSJOQc1JcPC23lw
diff --git a/taskcluster/test/params/mc-nightly-all.yml b/taskcluster/test/params/mc-nightly-all.yml
index 7196e12920..8160c3413b 100644
--- a/taskcluster/test/params/mc-nightly-all.yml
+++ b/taskcluster/test/params/mc-nightly-all.yml
@@ -345,7 +345,6 @@ existing_tasks:
   docker-image-firefox-snap: TaMBeARtSCKe485qQborMA
   docker-image-funsize-update-generator: RwrXtrceR_aEmcsEUxGiCg
   docker-image-gdb-test: ahyis7rkQTqhCapWXDqneg
-  docker-image-github-sync: ds8yNkB5ScKKqLW2Cv0OWQ
   docker-image-image_builder: Z3gDOem4TSWtoayyvtW_ng
   docker-image-index-task: dbQOfI1hTp6sh4sGNnW9sQ
   docker-image-lint: GntDF25JRUaCu5nuedyceA
@@ -4652,13 +4651,13 @@ existing_tasks:
   valgrind-linux64-valgrind-qr/opt-swr: SNO08UPaRoKwlQjHoyjb5A
 files_changed:
   - taskcluster/android_taskgraph/transforms/build_components.py
-  - taskcluster/ci/build-apk/kind.yml
-  - taskcluster/ci/build-bundle/kind.yml
-  - taskcluster/ci/build-components/kind.yml
-  - taskcluster/ci/build-samples-browser/kind.yml
-  - taskcluster/ci/test-apk/kind.yml
-  - taskcluster/ci/test-components/kind.yml
-  - taskcluster/ci/ui-test-apk/kind.yml
+  - taskcluster/kinds/build-apk/kind.yml
+  - taskcluster/kinds/build-bundle/kind.yml
+  - taskcluster/kinds/build-components/kind.yml
+  - taskcluster/kinds/build-samples-browser/kind.yml
+  - taskcluster/kinds/test-apk/kind.yml
+  - taskcluster/kinds/test-components/kind.yml
+  - taskcluster/kinds/ui-test-apk/kind.yml
 filters:
   - target_tasks_method
 head_ref: d9466bebb4c96b99a227f35b5a7e86bd0c8f5bb5
diff --git a/taskcluster/test/params/me-promote-firefox.yml b/taskcluster/test/params/me-promote-firefox.yml
index fc713a788e..6a4a9ceaee 100644
--- a/taskcluster/test/params/me-promote-firefox.yml
+++ b/taskcluster/test/params/me-promote-firefox.yml
@@ -97,7 +97,6 @@ existing_tasks:
   docker-image-firefox-snap: YmvNSMSfQWW3YG6x_Fcdbg
   docker-image-funsize-update-generator: H14MbupWQoyjX2KXVFC7Cg
   docker-image-gdb-test: WdZGFUBiTzyn5er0FJQUvw
-  docker-image-github-sync: SmOuKw2vSA2P0B6MxH6xXw
   docker-image-image_builder: MWRymupRSheUkuqIQwF8TA
   docker-image-index-task: VIneOK4VRXGrcEmrEpleSA
   docker-image-lint: Eeq8v2PJSbSivC61RBNaKg
diff --git a/taskcluster/test/params/me-push-firefox.yml b/taskcluster/test/params/me-push-firefox.yml
index 861a767660..57af7d97c5 100644
--- a/taskcluster/test/params/me-push-firefox.yml
+++ b/taskcluster/test/params/me-push-firefox.yml
@@ -2219,7 +2219,6 @@ existing_tasks:
   docker-image-firefox-snap: YmvNSMSfQWW3YG6x_Fcdbg
   docker-image-funsize-update-generator: H14MbupWQoyjX2KXVFC7Cg
   docker-image-gdb-test: WdZGFUBiTzyn5er0FJQUvw
-  docker-image-github-sync: SmOuKw2vSA2P0B6MxH6xXw
   docker-image-image_builder: MWRymupRSheUkuqIQwF8TA
   docker-image-index-task: VIneOK4VRXGrcEmrEpleSA
   docker-image-lint: Eeq8v2PJSbSivC61RBNaKg
diff --git a/taskcluster/test/params/me-ship-firefox.yml b/taskcluster/test/params/me-ship-firefox.yml
index 062b3218f2..f8bed8a843 100644
--- a/taskcluster/test/params/me-ship-firefox.yml
+++ b/taskcluster/test/params/me-ship-firefox.yml
@@ -2219,7 +2219,6 @@ existing_tasks:
   docker-image-firefox-snap: YmvNSMSfQWW3YG6x_Fcdbg
   docker-image-funsize-update-generator: H14MbupWQoyjX2KXVFC7Cg
   docker-image-gdb-test: WdZGFUBiTzyn5er0FJQUvw
-  docker-image-github-sync: SmOuKw2vSA2P0B6MxH6xXw
   docker-image-image_builder: MWRymupRSheUkuqIQwF8TA
   docker-image-index-task: VIneOK4VRXGrcEmrEpleSA
   docker-image-lint: Eeq8v2PJSbSivC61RBNaKg
diff --git a/taskcluster/test/params/mr-promote-firefox-rc.yml b/taskcluster/test/params/mr-promote-firefox-rc.yml
index 0059b6b7aa..c373c7947c 100644
--- a/taskcluster/test/params/mr-promote-firefox-rc.yml
+++ b/taskcluster/test/params/mr-promote-firefox-rc.yml
@@ -113,7 +113,6 @@ existing_tasks:
   docker-image-firefox-snap: YmvNSMSfQWW3YG6x_Fcdbg
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: SqgEZnNpSoqvNxaY-P2OCA
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: PvzC5kHhQiGDcIo5GhW6TQ
diff --git a/taskcluster/test/params/mr-promote-firefox.yml b/taskcluster/test/params/mr-promote-firefox.yml
index 0e132051ee..356ca3536a 100644
--- a/taskcluster/test/params/mr-promote-firefox.yml
+++ b/taskcluster/test/params/mr-promote-firefox.yml
@@ -113,7 +113,6 @@ existing_tasks:
   docker-image-firefox-snap: YmvNSMSfQWW3YG6x_Fcdbg
   docker-image-funsize-update-generator: H14MbupWQoyjX2KXVFC7Cg
   docker-image-gdb-test: SqgEZnNpSoqvNxaY-P2OCA
-  docker-image-github-sync: P_Ymo66MSamplL2DUkKafA
   docker-image-image_builder: MWRymupRSheUkuqIQwF8TA
   docker-image-index-task: VIneOK4VRXGrcEmrEpleSA
   docker-image-lint: PvzC5kHhQiGDcIo5GhW6TQ
diff --git a/taskcluster/test/params/mr-push-firefox.yml b/taskcluster/test/params/mr-push-firefox.yml
index de12bc2d85..fd4f5e5016 100644
--- a/taskcluster/test/params/mr-push-firefox.yml
+++ b/taskcluster/test/params/mr-push-firefox.yml
@@ -2358,7 +2358,6 @@ existing_tasks:
   docker-image-firefox-snap: YmvNSMSfQWW3YG6x_Fcdbg
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: SqgEZnNpSoqvNxaY-P2OCA
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: PvzC5kHhQiGDcIo5GhW6TQ
diff --git a/taskcluster/test/params/mr-ship-firefox-rc.yml b/taskcluster/test/params/mr-ship-firefox-rc.yml
index d2701afb48..b7b7ca162e 100644
--- a/taskcluster/test/params/mr-ship-firefox-rc.yml
+++ b/taskcluster/test/params/mr-ship-firefox-rc.yml
@@ -2358,7 +2358,6 @@ existing_tasks:
   docker-image-firefox-snap: YmvNSMSfQWW3YG6x_Fcdbg
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: SqgEZnNpSoqvNxaY-P2OCA
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: PvzC5kHhQiGDcIo5GhW6TQ
diff --git a/taskcluster/test/params/mr-ship-firefox.yml b/taskcluster/test/params/mr-ship-firefox.yml
index 552baee4b8..ecd616f800 100644
--- a/taskcluster/test/params/mr-ship-firefox.yml
+++ b/taskcluster/test/params/mr-ship-firefox.yml
@@ -2358,7 +2358,6 @@ existing_tasks:
   docker-image-firefox-snap: YmvNSMSfQWW3YG6x_Fcdbg
   docker-image-funsize-update-generator: YpyGQfXQQbGvpCIFyfWZ7A
   docker-image-gdb-test: SqgEZnNpSoqvNxaY-P2OCA
-  docker-image-github-sync: GwZWXkYyQtGNRZnzVYuzCg
   docker-image-image_builder: OCRS9sC9SSeoQ96W91n8sQ
   docker-image-index-task: RwDns0jjRregWw0RNoOKeg
   docker-image-lint: PvzC5kHhQiGDcIo5GhW6TQ
diff --git a/taskcluster/test/test_autoland.py b/taskcluster/test/test_autoland.py
index 05d181620a..a6607fde01 100644
--- a/taskcluster/test/test_autoland.py
+++ b/taskcluster/test/test_autoland.py
@@ -16,6 +16,34 @@ PARAMS = {
 }
 
 
+def test_tasks_have_optimization(full_task_graph, filter_tasks):
+    kinds = (
+        "artifact_build",
+        "build-fat-aar",
+        "build",
+        "generate-profile",
+        "hazard",
+        "instrumented-build",
+        "spidermonkey",
+        "static-analysis-autotest",
+        "test",
+        "valgrind",
+    )
+    errors = []
+    for task in filter_tasks(
+        full_task_graph, lambda t: t.kind in kinds and "ccov" not in t.label
+    ):
+        if not task.optimization:
+            errors.append(task.label)
+
+    if errors:
+        label_str = "\n  ".join(errors)
+        s_are = " is" if len(errors) == 1 else "s are"
+        pytest.fail(
+            f"The following task{s_are} missing an optimization:\n  {label_str}"
+        )
+
+
 def test_generate_graph(optimized_task_graph):
     """Simply tests that generating the graph does not fail."""
     assert len(optimized_task_graph.tasks) > 0