Adding upstream version 86.0.1.upstream/86.0.1upstream

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

9 files changed, 5080 insertions, 0 deletions

diff --git a/taskcluster/ci/build/android-stuff.yml b/taskcluster/ci/build/android-stuff.yml
new file mode 100644
index 0000000000..e1d2acd91e
--- /dev/null
+++ b/taskcluster/ci/build/android-stuff.yml
@@ -0,0 +1,52 @@
+# 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/.
+---
+job-defaults:
+    tags:
+        android-stuff: "true"
+    run:
+        mozconfig-variant: null
+
+android-geckoview-docs/opt:
+    description: "Android GeckoView docs"
+    index:
+        product: mobile
+        job-name: android-geckoview-docs
+    treeherder:
+        platform: android-4-0-armv7-api16/opt
+        kind: build
+        tier: 2
+        symbol: A(gv-docs)
+    run-on-projects: [mozilla-central]
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: android-build}
+        env:
+            GRADLE_USER_HOME: "/builds/worker/checkouts/gecko/mobile/android/gradle/dotgradle-offline"
+            PERFHERDER_EXTRA_OPTIONS: android-geckoview-docs
+            GECKOVIEW_DOCS_UPLOAD_SECRET: "project/releng/gecko/build/level-{level}/geckoview-docs-upload"
+        artifacts:
+            - name: public/android/geckoview-docs/geckoview-javadoc.jar
+              path: /builds/worker/workspace/obj-build/gradle/build/mobile/android/geckoview/libs/geckoview-javadoc.jar
+              type: file
+        max-run-time: 7200
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_android_64_builds.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        custom-build-variant-cfg: android-geckoview-docs
+        tooltool-downloads: internal
+    fetches:
+        toolchain:
+            - android-gradle-dependencies
+            - android-sdk-linux
+            - linux64-node
+    optimization:
+        skip-unless-changed:
+            - "mobile/android/**/*.java"
+            - "mobile/android/gradle.configure"
+            - "**/*.gradle"
diff --git a/taskcluster/ci/build/android.yml b/taskcluster/ci/build/android.yml
new file mode 100644
index 0000000000..35e662e315
--- /dev/null
+++ b/taskcluster/ci/build/android.yml
@@ -0,0 +1,568 @@
+# 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/.
+---
+job-defaults:
+    attributes:
+        artifact_map: taskcluster/taskgraph/manifests/fennec_geckoview.yml
+    index:
+        product: mobile
+    worker:
+        docker-image: {in-tree: android-build}
+        max-run-time: 7200
+        env:
+            GRADLE_USER_HOME: "/builds/worker/checkouts/gecko/mobile/android/gradle/dotgradle-offline"
+        artifacts:
+            - name: public/build/maven
+              path: /builds/worker/workspace/obj-build/gradle/build/mobile/android/geckoview/maven/
+              type: directory
+            - name: public/build/geckoview-androidTest.apk
+              path: /builds/worker/workspace/obj-build/gradle/build/mobile/android/geckoview/outputs/apk/androidTest/withGeckoBinaries/debug/geckoview-withGeckoBinaries-debug-androidTest.apk
+              type: file
+            - name: public/build/geckoview_example.apk
+              path: /builds/worker/workspace/obj-build/gradle/build/mobile/android/geckoview_example/outputs/apk/withGeckoBinaries/debug/geckoview_example-withGeckoBinaries-debug.apk
+              type: file
+            - name: public/build
+              path: /builds/worker/artifacts/
+              type: directory
+    run:
+        using: mozharness
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        mozconfig-variant: null
+        tooltool-downloads: internal
+    fetches:
+        toolchain:
+            - android-gradle-dependencies
+            - android-ndk-linux
+            - android-sdk-linux
+            - linux64-rust-android
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-nasm
+            - linux64-node
+
+android-api-16/debug:
+    description: "Android 4.0 api-16+ Debug"
+    index:
+        job-name: android-api-16-debug
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: android-4-0-armv7-api16/debug
+        symbol: B
+    worker-type: b-linux
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build]
+        config: ["builds/releng_base_android_64_builds.py"]
+        custom-build-variant-cfg: api-16-debug
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang
+            - linux64-sccache
+
+android-x86/opt:
+    description: "Android 4.2 x86 Opt"
+    index:
+        job-name: android-x86-opt
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: android-4-2-x86/opt
+        symbol: B
+    run-on-projects: ['integration']
+    worker-type: b-linux
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android-x86/releng.manifest"
+    run:
+        actions: [get-secrets, build]
+        config: ["builds/releng_base_android_64_builds.py"]
+        custom-build-variant-cfg: x86
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang
+            - linux64-sccache
+
+android-x86-fuzzing/debug:
+    description: "Android x86 Fuzzing Debug"
+    index:
+        job-name: android-x86-fuzzing-debug
+    treeherder:
+        platform: android-4-2-x86/debug
+        symbol: Bf
+    worker-type: b-linux
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android-x86/releng.manifest"
+    run:
+        actions: [get-secrets, build]
+        config: ["builds/releng_base_android_64_builds.py"]
+        custom-build-variant-cfg: x86-fuzzing-debug
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang
+            - linux64-sccache
+    optimization:
+        skip-unless-expanded: null
+
+android-x86-shippable/opt:
+    description: "Android 4.2 x86 Shippable"
+    attributes:
+        enable-full-crashsymbols: true
+        shippable: true
+    shipping-phase: build
+    shipping-product: fennec
+    index:
+        job-name: android-x86-opt
+        type: android-shippable
+    treeherder:
+        platform: android-4-2-x86-shippable/opt
+        symbol: B
+    run-on-projects: ['release']
+    worker-type: b-linux
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android-x86/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build, multi-l10n]
+        config:
+            - builds/releng_base_android_64_builds.py
+            - taskcluster_nightly.py
+        custom-build-variant-cfg: x86
+    fetches:
+        toolchain:
+            - linux64-clang
+
+android-api-16/opt:
+    description: "Android 4.0 api-16+ Opt"
+    index:
+        job-name: android-api-16-opt
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: android-4-0-armv7-api16/opt
+        symbol: B
+    run-on-projects: ['integration']
+    worker-type: b-linux
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build]
+        config: ["builds/releng_base_android_64_builds.py"]
+        custom-build-variant-cfg: api-16
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang
+            - linux64-sccache
+
+android-api-16-shippable/opt:
+    description: "Android 4.0 api-16+ Shippable"
+    use-pgo: true
+    attributes:
+        enable-full-crashsymbols: true
+        shippable: true
+    shipping-phase: build
+    shipping-product: fennec
+    index:
+        job-name: android-api-16-opt
+        type: android-shippable-with-multi-l10n
+    treeherder:
+        platform: android-4-0-armv7-api16-shippable/opt
+        symbol: Bpgo(B)
+    run-on-projects: ['release']
+    worker-type: b-linux
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build, multi-l10n]
+        config:
+            - builds/releng_base_android_64_builds.py
+            - taskcluster_nightly.py
+        custom-build-variant-cfg: api-16
+    fetches:
+        toolchain:
+            - linux64-clang
+
+android-aarch64/opt:
+    description: "Android 5.0 AArch64 Opt"
+    index:
+        job-name: android-aarch64-opt
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: android-5-0-aarch64/opt
+        symbol: B
+    run-on-projects: ['integration']
+    worker-type: b-linux
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build]
+        config: ["builds/releng_base_android_64_builds.py"]
+        custom-build-variant-cfg: aarch64
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang
+            - linux64-sccache
+
+android-aarch64/debug:
+    description: "Android 5.0 AArch64 Debug"
+    index:
+        job-name: android-aarch64-debug
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: android-5-0-aarch64/debug
+        symbol: B
+    worker-type: b-linux
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build]
+        config: ["builds/releng_base_android_64_builds.py"]
+        custom-build-variant-cfg: aarch64-debug
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang
+            - linux64-sccache
+
+android-aarch64-shippable/opt:
+    description: "Android 5.0 AArch64 Shippable"
+    use-pgo: android-api-16-shippable/opt
+    attributes:
+        enable-full-crashsymbols: true
+        shippable: true
+    shipping-phase: build
+    shipping-product: fennec
+    index:
+        job-name: android-aarch64-opt
+        type: android-shippable
+    treeherder:
+        platform: android-5-0-aarch64-shippable/opt
+        symbol: Bpgo(B)
+    run-on-projects: ['release']
+    worker-type: b-linux
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build, multi-l10n]
+        config:
+            - builds/releng_base_android_64_builds.py
+            - taskcluster_nightly.py
+        custom-build-variant-cfg: aarch64
+    fetches:
+        toolchain:
+            - linux64-clang
+
+android-x86_64/opt:
+    description: "Android 5.0 x86-64 Opt"
+    index:
+        job-name: android-x86_64-opt
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: android-5-0-x86_64/opt
+        symbol: B
+    run-on-projects: ['integration']
+    worker-type: b-linux
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android-x86/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build]
+        config: ["builds/releng_base_android_64_builds.py"]
+        custom-build-variant-cfg: x86_64
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang
+            - linux64-sccache
+
+android-x86_64-shippable/opt:
+    description: "Android 5.0 x86-64 Shippable"
+    attributes:
+        enable-full-crashsymbols: true
+        shippable: true
+    shipping-phase: build
+    shipping-product: fennec
+    index:
+        job-name: android-x86_64-opt
+        type: android-shippable
+    treeherder:
+        platform: android-5-0-x86_64-shippable/opt
+        symbol: B
+    run-on-projects: ['release']
+    worker-type: b-linux
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android-x86/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build, multi-l10n]
+        config:
+            - builds/releng_base_android_64_builds.py
+            - taskcluster_nightly.py
+        custom-build-variant-cfg: x86_64
+    fetches:
+        toolchain:
+            - linux64-clang
+
+android-x86_64/debug:
+    description: "Android 5.0 x86-64 Debug"
+    index:
+        job-name: android-x86_64-debug
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: android-5-0-x86_64/debug
+        symbol: B
+    worker-type: b-linux
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android-x86/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build]
+        config: ["builds/releng_base_android_64_builds.py"]
+        custom-build-variant-cfg: x86_64-debug
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang
+            - linux64-sccache
+
+
+android-api-16-gcp/debug:
+    description: "Android 4.0 api-16+ Debug - built on GCP"
+    index:
+        job-name: android-api-16-gcp-debug
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: android-4-0-armv7-api16/debug
+        symbol: Bg
+        tier: 3
+    worker-type: b-linux-gcp
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android/releng.manifest"
+            PERFHERDER_EXTRA_OPTIONS: gcp
+    run:
+        actions: [get-secrets, build]
+        config: ["builds/releng_base_android_64_builds.py"]
+        custom-build-variant-cfg: api-16-debug
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang
+            - linux64-sccache
+    optimization:
+        skip-unless-backstop: null
+
+
+android-x86-gcp/opt:
+    description: "Android 4.2 x86 Opt - built on GCP"
+    index:
+        job-name: android-x86-gcp-opt
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: android-4-2-x86/opt
+        symbol: Bg
+        tier: 3
+    worker-type: b-linux-gcp
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android-x86/releng.manifest"
+            PERFHERDER_EXTRA_OPTIONS: gcp
+    run:
+        actions: [get-secrets, build]
+        config: ["builds/releng_base_android_64_builds.py"]
+        custom-build-variant-cfg: x86
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang
+            - linux64-sccache
+    optimization:
+        skip-unless-backstop: null
+
+android-api-16-gcp/opt:
+    description: "Android 4.0 api-16+ Opt - built on GCP"
+    index:
+        job-name: android-api-16-gcp-opt
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: android-4-0-armv7-api16/opt
+        symbol: Bg
+        tier: 3
+    worker-type: b-linux-gcp
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android/releng.manifest"
+            PERFHERDER_EXTRA_OPTIONS: gcp
+    run:
+        actions: [get-secrets, build]
+        config: ["builds/releng_base_android_64_builds.py"]
+        custom-build-variant-cfg: api-16
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang
+            - linux64-sccache
+    optimization:
+        skip-unless-backstop: null
+
+android-aarch64-gcp/opt:
+    description: "Android 5.0 AArch64 Opt - built on GCP"
+    index:
+        job-name: android-aarch64-gcp-opt
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: android-5-0-aarch64/opt
+        symbol: Bg
+        tier: 3
+    worker-type: b-linux-gcp
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android/releng.manifest"
+            PERFHERDER_EXTRA_OPTIONS: gcp
+    run:
+        actions: [get-secrets, build]
+        config: ["builds/releng_base_android_64_builds.py"]
+        custom-build-variant-cfg: aarch64
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang
+            - linux64-sccache
+    optimization:
+        skip-unless-backstop: null
+
+android-aarch64-gcp/debug:
+    description: "Android 5.0 AArch64 Debug - built on GCP"
+    index:
+        job-name: android-aarch64-gcp-debug
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: android-5-0-aarch64/debug
+        symbol: Bg
+        tier: 3
+    worker-type: b-linux-gcp
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android/releng.manifest"
+            PERFHERDER_EXTRA_OPTIONS: gcp
+    run:
+        actions: [get-secrets, build]
+        config: ["builds/releng_base_android_64_builds.py"]
+        custom-build-variant-cfg: aarch64-debug
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang
+            - linux64-sccache
+    optimization:
+        skip-unless-backstop: null
+
+android-x86_64-gcp/opt:
+    description: "Android 5.0 x86-64 Opt - built on GCP"
+    index:
+        job-name: android-x86_64-gcp-opt
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: android-5-0-x86_64/opt
+        symbol: Bg
+        tier: 3
+    worker-type: b-linux-gcp
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android-x86/releng.manifest"
+            PERFHERDER_EXTRA_OPTIONS: gcp
+    run:
+        actions: [get-secrets, build]
+        config: ["builds/releng_base_android_64_builds.py"]
+        custom-build-variant-cfg: x86_64
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang
+            - linux64-sccache
+    optimization:
+        skip-unless-backstop: null
+
+android-x86_64-gcp/debug:
+    description: "Android 5.0 x86-64 Debug - built on GCP"
+    index:
+        job-name: android-x86_64-gcp-debug
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: android-5-0-x86_64/debug
+        symbol: Bg
+        tier: 3
+    worker-type: b-linux-gcp
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android-x86/releng.manifest"
+            PERFHERDER_EXTRA_OPTIONS: gcp
+    run:
+        actions: [get-secrets, build]
+        config: ["builds/releng_base_android_64_builds.py"]
+        custom-build-variant-cfg: x86_64-debug
+    fetches:
+        toolchain:
+            - linux64-clang
+    optimization:
+        skip-unless-backstop: null
+
+android-x86_64-asan-fuzzing/opt:
+    description: "Android 5.0 x86-64 Fuzzing Opt ASAN"
+    index:
+        job-name: android-x86_64-fuzzing-asan
+    treeherder:
+        platform: android-5-0-x86_64/asan
+        symbol: Bof
+    worker-type: b-linux
+    worker:
+        env:
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android-x86/releng.manifest"
+    run:
+        actions: [get-secrets, build]
+        config: ["builds/releng_base_android_64_builds.py"]
+        custom-build-variant-cfg: x86_64-fuzzing-asan
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang-android-cross
+            - linux64-sccache
+    optimization:
+        skip-unless-expanded: null
diff --git a/taskcluster/ci/build/kind.yml b/taskcluster/ci/build/kind.yml
new file mode 100644
index 0000000000..71baa0da79
--- /dev/null
+++ b/taskcluster/ci/build/kind.yml
@@ -0,0 +1,79 @@
+# 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: taskgraph.loader.transform:loader
+
+kind-dependencies:
+    - toolchain
+    - fetch
+    - generate-profile
+
+transforms:
+    - taskgraph.transforms.build:transforms
+    - taskgraph.transforms.build_attrs:transforms
+    - taskgraph.transforms.build_lints:transforms
+    - taskgraph.transforms.release_notifications:transforms
+    - taskgraph.transforms.job:transforms
+    - taskgraph.transforms.task:transforms
+
+jobs-from:
+    - android.yml
+    - android-stuff.yml
+    - linux.yml
+    - linux-base-toolchains.yml
+    - macosx.yml
+    - macosx-native.yml
+    - windows.yml
+    - windows-mingw.yml
+
+job-defaults:
+    run:
+        mozconfig-variant:
+            by-release-type:
+                beta: beta
+                release.*: release
+                # We keep using the release configs as the beta and release configs are
+                # identical except for
+                # https://searchfox.org/mozilla-central/rev/ce9ff94ffed34dc17ec0bfa406156d489eaa8ee1/browser/config/mozconfigs/linux32/release#1    # noqa
+                esr.*: release
+                default: nightly
+        # Note: These settings are only honored by nightly (i.e. shipping) builds
+        update-channel:
+            by-release-type:
+                nightly: nightly
+                nightly-oak: nightly-oak
+                beta:
+                    by-shipping-product:
+                        devedition: aurora
+                        default: beta
+                release.*: release
+                esr.*: esr
+                default:
+                    by-project:
+                        try: nightly-try
+                        default: null
+        # ACCEPTED_MAR_CHANNEL_IDS should usually be the same as the value MAR_CHANNEL_ID.
+        # If more than one ID is needed, then you should use a comma separated list
+        # of values.
+        # The MAR_CHANNEL_ID must not contain the following 3 characters: ",\t "
+        mar-channel-id:
+            by-release-type:
+                nightly.*: firefox-mozilla-central
+                beta:
+                    by-shipping-product:
+                        devedition: firefox-mozilla-aurora
+                        default: firefox-mozilla-beta
+                release.*: firefox-mozilla-release
+                esr.*: firefox-mozilla-esr
+                default: firefox-mozilla-central
+        accepted-mar-channel-ids:
+            by-release-type:
+                nightly.*: firefox-mozilla-central
+                beta:
+                    by-shipping-product:
+                        devedition: firefox-mozilla-aurora
+                        default: firefox-mozilla-beta,firefox-mozilla-release
+                release.*: firefox-mozilla-release
+                esr.*: firefox-mozilla-esr
+                default: firefox-mozilla-central
diff --git a/taskcluster/ci/build/linux-base-toolchains.yml b/taskcluster/ci/build/linux-base-toolchains.yml
new file mode 100644
index 0000000000..0e315f778e
--- /dev/null
+++ b/taskcluster/ci/build/linux-base-toolchains.yml
@@ -0,0 +1,171 @@
+# 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/.
+#
+# We have these build jobs in a separate file because their definitions are
+# different enough from the main Linux build jobs that their presence in
+# linux.yml would make using job-defaults there significantly less useful.
+---
+linux64-base-toolchains/opt:
+    description: "Linux64 base toolchains Opt"
+    index:
+        product: firefox
+        job-name: linux64-base-toolchains-opt
+    treeherder:
+        platform: linux64/opt
+        symbol: Bb
+    run-on-projects: ['mozilla-central']
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian8-amd64-build-base}
+        max-run-time: 7200
+        env:
+            MOZ_LOW_PARALLELISM_BUILD: '1'
+            PERFHERDER_EXTRA_OPTIONS: base-toolchains
+            FORCE_GCC: '1'
+    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
+        tooltool-downloads: public
+        need-xvfb: true
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang-5.0
+            - linux64-gcc-7
+            - linux64-rust-1.47
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-nasm-2.14.02
+            - linux64-node
+
+linux64-base-toolchains/debug:
+    description: "Linux64 base toolchains Debug"
+    index:
+        product: firefox
+        job-name: linux64-base-toolchains-debug
+    treeherder:
+        platform: linux64/debug
+        symbol: Bb
+    optimization:
+        skip-unless-expanded: null
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian8-amd64-build-base}
+        max-run-time: 7200
+        env:
+            MOZ_LOW_PARALLELISM_BUILD: '1'
+            PERFHERDER_EXTRA_OPTIONS: base-toolchains
+            FORCE_GCC: '1'
+    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: debug
+        mozconfig-variant: debug
+        tooltool-downloads: public
+        need-xvfb: true
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-clang-5.0
+            - linux64-gcc-7
+            - linux64-rust-1.47
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-nasm-2.14.02
+            - linux64-node
+            # `fix-stacks` is needed because xpcshell self tests run as part of
+            # the build step. Once bug 1614626 moves them to the xpcshell task,
+            # this dependency can be removed.
+            - linux64-fix-stacks
+
+linux64-base-toolchains-clang/opt:
+    description: "Linux64 base toolchains clang Opt"
+    index:
+        product: firefox
+        job-name: linux64-base-toolchains-clang-opt
+    treeherder:
+        platform: linux64/opt
+        symbol: Bbc
+    run-on-projects: ['mozilla-central']
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian8-amd64-build-base}
+        max-run-time: 7200
+        env:
+            PERFHERDER_EXTRA_OPTIONS: base-toolchains-clang
+            DISABLE_CLANG_PLUGIN: '1'
+    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
+        tooltool-downloads: public
+        need-xvfb: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-5.0
+            - linux64-rust-1.47
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-nasm-2.14.02
+            - linux64-node
+
+linux64-base-toolchains-clang/debug:
+    description: "Linux64 base toolchains clang Debug"
+    index:
+        product: firefox
+        job-name: linux64-base-toolchains-clang-debug
+    treeherder:
+        platform: linux64/debug
+        symbol: Bbc
+    optimization:
+        skip-unless-expanded: null
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian8-amd64-build-base}
+        max-run-time: 5400
+        env:
+            PERFHERDER_EXTRA_OPTIONS: base-toolchains-clang
+            DISABLE_CLANG_PLUGIN: '1'
+    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: debug
+        mozconfig-variant: debug
+        tooltool-downloads: public
+        need-xvfb: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-5.0
+            - linux64-rust-1.47
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-nasm-2.14.02
+            - linux64-node
+            # `fix-stacks` is needed because xpcshell self tests run as part of
+            # the build step. Once bug 1614626 moves them to the xpcshell task,
+            # this dependency can be removed.
+            - linux64-fix-stacks
diff --git a/taskcluster/ci/build/linux.yml b/taskcluster/ci/build/linux.yml
new file mode 100644
index 0000000000..380c2a1847
--- /dev/null
+++ b/taskcluster/ci/build/linux.yml
@@ -0,0 +1,1564 @@
+# 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/.
+---
+linux64/opt:
+    description: "Linux64 Opt"
+    index:
+        product: firefox
+        job-name: linux64-opt
+    attributes:
+        enable-build-signing: true
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: linux64/opt
+        symbol: B
+    worker-type: b-linux
+    worker:
+        max-run-time: 7200
+        env:
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    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
+        tooltool-downloads: public
+        need-xvfb: true
+    run-on-projects: ['integration']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+
+linux64-plain/opt:
+    description: "Linux64 Opt Plain"
+    index:
+        product: firefox
+        job-name: linux64-plain-opt
+    treeherder:
+        platform: linux64/opt
+        symbol: Bp
+        tier: 2
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 5400
+        env:
+            PERFHERDER_EXTRA_OPTIONS: plain
+    run:
+        using: mozharness
+        actions: [build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+        script: mozharness/scripts/fx_desktop_build.py
+        tooltool-downloads: public
+        extra-config:
+            disable_package_metrics: true
+        mozconfig-variant: plain-opt
+    run-on-projects: ['mozilla-central']
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-dump-syms
+    optimization:
+        skip-unless-expanded: null
+
+linux64-fuzzing/debug:
+    description: "Linux64 Fuzzing Debug"
+    index:
+        product: firefox
+        job-name: linux64-fuzzing-debug
+    attributes:
+        # The gtest libxul contains libFuzzer targets
+        skip-verify-test-packaging: true
+    treeherder:
+        platform: linux64/debug
+        symbol: Bf
+    worker-type: b-linux
+    worker:
+        max-run-time: 5400
+        env:
+            MOZ_LOW_PARALLELISM_BUILD: '1'
+            PERFHERDER_EXTRA_OPTIONS: fuzzing
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    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-debug
+        mozconfig-variant: debug-fuzzing
+        tooltool-downloads: public
+        need-xvfb: true
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-llvm-symbolizer
+            - linux64-sccache
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+            # `fix-stacks` is needed because xpcshell self tests run as part of
+            # the build step. Once bug 1614626 moves them to the xpcshell task,
+            # this dependency can be removed.
+            - linux64-fix-stacks
+    optimization:
+        skip-unless-expanded: null
+
+linux64/debug:
+    description: "Linux64 Debug"
+    index:
+        product: firefox
+        job-name: linux64-debug
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: linux64/debug
+        symbol: B
+    worker-type: b-linux
+    worker:
+        max-run-time: 5400
+        env:
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    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: debug
+        mozconfig-variant: debug
+        tooltool-downloads: public
+        need-xvfb: true
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+            # `fix-stacks` is needed because xpcshell self tests run as part of
+            # the build step. Once bug 1614626 moves them to the xpcshell task,
+            # this dependency can be removed.
+            - linux64-fix-stacks
+
+linux64/codeql-cpp:
+    description: Builds a C++ codeql database
+    index:
+        job-name: linux64-codeql-cpp
+        product: firefox
+    treeherder:
+        platform: codeql/all
+        symbol: linux64-cpp
+        tier: 2
+        kind: other
+    shipping-phase: ship
+    shipping-product: firefox
+    worker-type: b-linux-xlarge
+    expires-after: 4 days
+    worker:
+        env:
+            PERFHERDER_EXTRA_OPTIONS: cpp
+        max-run-time: 86400
+        artifacts:
+            - type: file
+              name: public/codeql/codeql-db-cpp.tar.xz
+              path: /builds/worker/codeql-db-cpp.tar.xz
+    run:
+        using: mozharness
+        actions: [build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        job-script: taskcluster/scripts/misc/generate-codeql-db-cpp.sh
+        secrets: false
+        custom-build-variant-cfg: debug
+        mozconfig-variant: debug
+        tooltool-downloads: public
+        need-xvfb: true
+    run-on-projects: []
+    fetches:
+        fetch:
+            - codeql-2.0.3
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+            # `fix-stacks` is needed because xpcshell self tests run as part of
+            # the build step. Once bug 1614626 moves them to the xpcshell task,
+            # this dependency can be removed.
+            - linux64-fix-stacks
+    notifications:
+        subject: '{task[shipping-product]} {release_config[version]} build{release_config[build_number]}/{config[params][project]} linux64 codeql-cpp status'
+        message: '{task[shipping-product]} {release_config[version]} build{release_config[build_number]}/{config[params][project]} linux64 codeql-cpp status'
+        emails:
+            by-project:
+                mozilla-release: ["tom@mozilla.com", "freddy@mozilla.com"]
+                try: ["{config[params][owner]}"]
+                default: []
+    optimization: null
+
+
+linux64-plain/debug:
+    description: "Linux64 Debug Plain"
+    index:
+        product: firefox
+        job-name: linux64-plain-debug
+    treeherder:
+        platform: linux64/debug
+        symbol: Bp
+        tier: 2
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 5400
+        env:
+            PERFHERDER_EXTRA_OPTIONS: plain
+    run:
+        using: mozharness
+        actions: [build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+        extra-config:
+            disable_package_metrics: true
+        mozconfig-variant: plain-debug
+        script: mozharness/scripts/fx_desktop_build.py
+        tooltool-downloads: public
+    run-on-projects: [trunk]
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-dump-syms
+    optimization:
+        skip-unless-expanded: null
+
+linux64-devedition/opt:
+    description: "Linux64 devedition (shippable)"
+    use-pgo: linux64-shippable/opt
+    attributes:
+        shippable: true
+        enable-full-crashsymbols: true
+    shipping-phase: build
+    shipping-product: devedition
+    index:
+        product: devedition
+        job-name: linux64-opt
+        type: shippable
+    treeherder:
+        platform: linux64-devedition/opt
+        symbol: B
+    worker-type: b-linux
+    worker:
+        max-run-time: 7200
+        env:
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - taskcluster_nightly.py
+        extra-config:
+            stage_platform: 'linux64-devedition'
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        tooltool-downloads: public
+        need-xvfb: true
+        mozconfig-variant: devedition
+    run-on-projects: ['mozilla-beta']
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+
+linux/opt:
+    description: "Linux32 Opt"
+    index:
+        product: firefox
+        job-name: linux-opt
+    attributes:
+        enable-build-signing: true
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: linux32/opt
+        symbol: B
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian8-i386-build}
+        max-run-time: 7200
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_32_builds.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        tooltool-downloads: public
+        need-xvfb: true
+    run-on-projects: ['mozilla-beta', 'mozilla-release', 'mozilla-esr78']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+
+linux/debug:
+    description: "Linux32 Debug"
+    index:
+        product: firefox
+        job-name: linux-debug
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: linux32/debug
+        symbol: B
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian8-i386-build}
+        max-run-time: 5400
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_32_builds.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        custom-build-variant-cfg: debug
+        mozconfig-variant: debug
+        tooltool-downloads: public
+        need-xvfb: true
+    run-on-projects: ['release']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+            # `fix-stacks` is needed because xpcshell self tests run as part of
+            # the build step. Once bug 1614626 moves them to the xpcshell task,
+            # this dependency can be removed.
+            - linux64-fix-stacks
+
+linux-rusttests/opt:
+    description: "Linux32 Rust Tests Opt"
+    index:
+        product: firefox
+        job-name: linux-rusttests-opt
+    treeherder:
+        platform: linux32/opt
+        symbol: BR
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian8-i386-build}
+        max-run-time: 2700
+        env:
+            PERFHERDER_EXTRA_OPTIONS: rusttests
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_32_builds.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        custom-build-variant-cfg: rusttests
+        mozconfig-variant: rusttests
+        tooltool-downloads: public
+        keep-artifacts: false
+    run-on-projects: ['mozilla-central']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+    optimization:
+        test-inclusive: [rusttests]
+
+linux-rusttests/debug:
+    description: "Linux32 Rust Tests Debug"
+    index:
+        product: firefox
+        job-name: linux-rusttests-debug
+    treeherder:
+        platform: linux32/debug
+        symbol: BR
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian8-i386-build}
+        max-run-time: 2700
+        env:
+            PERFHERDER_EXTRA_OPTIONS: rusttests
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_32_builds.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        custom-build-variant-cfg: rusttests-debug
+        mozconfig-variant: rusttests-debug
+        tooltool-downloads: public
+        keep-artifacts: false
+    run-on-projects: ['mozilla-central']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+    optimization:
+        test-inclusive: [rusttests]
+
+linux-devedition/opt:
+    description: "Linux32 devedition (shippable)"
+    use-pgo: linux-shippable/opt
+    attributes:
+        shippable: true
+        enable-full-crashsymbols: true
+    shipping-phase: build
+    shipping-product: devedition
+    index:
+        product: devedition
+        job-name: linux-opt
+        type: shippable
+    treeherder:
+        platform: linux32-devedition/opt
+        symbol: B
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian8-i386-build}
+        max-run-time: 7200
+        env:
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_32_builds.py
+            - taskcluster_nightly.py
+        extra-config:
+            stage_platform: linux-devedition
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        tooltool-downloads: public
+        need-xvfb: true
+        mozconfig-variant: devedition
+    run-on-projects: ['mozilla-beta']
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+
+linux-shippable/opt:
+    description: "Linux32 Shippable"
+    use-pgo: true
+    attributes:
+        shippable: true
+        enable-full-crashsymbols: true
+    shipping-phase: build
+    shipping-product: firefox
+    index:
+        product: firefox
+        job-name: linux-opt
+        type: shippable
+    treeherder:
+        platform: linux32-shippable/opt
+        symbol: Bpgo(B)
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian8-i386-build}
+        max-run-time: 9000
+        env:
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_32_builds.py
+            - taskcluster_nightly.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        tooltool-downloads: public
+        need-xvfb: true
+    run-on-projects: ['release']
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+
+linux-reproduced/opt:
+    description: "Linux32 Reproduced"
+    use-pgo: linux-shippable/opt
+    shipping-phase: build
+    shipping-product: firefox
+    index:
+        product: firefox
+        job-name: linux-reproduced-opt
+    treeherder:
+        platform: linux32-shippable/opt
+        symbol: Bpgo(repr)
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian8-i386-build}
+        max-run-time: 9000
+        env:
+            PERFHERDER_EXTRA_OPTIONS: repr
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_32_builds.py
+            - taskcluster_nightly.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        tooltool-downloads: public
+        need-xvfb: true
+    # Original comment: Limited to trunk until bug 1596350 is fixed.
+    # Addendum: Do not run on autoland, Bug 1599197
+    run-on-projects: ['mozilla-central', 'comm-central']
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+
+linux64-reproduced/opt:
+    description: "Linux64 Reproduced"
+    use-pgo: linux64-shippable/opt
+    shipping-phase: build
+    shipping-product: firefox
+    index:
+        product: firefox
+        job-name: linux64-reproduced-opt
+    treeherder:
+        platform: linux64-shippable/opt
+        symbol: Bpgo(repr)
+    worker-type: b-linux
+    worker:
+        max-run-time: 9000
+        env:
+            PERFHERDER_EXTRA_OPTIONS: repr
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - taskcluster_nightly.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        tooltool-downloads: public
+        need-xvfb: true
+    # Original comment: Limited to trunk until bug 1596350 is fixed.
+    # Addendum: Do not run on autoland, Bug 1599197
+    run-on-projects: ['mozilla-central', 'comm-central']
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+
+linux64-asan/opt:
+    description: "Linux64 Opt ASAN"
+    index:
+        product: firefox
+        job-name: linux64-asan-opt
+    treeherder:
+        platform: linux64/asan
+        symbol: Bo
+    worker-type: b-linux
+    worker:
+        env:
+            PERFHERDER_EXTRA_OPTIONS: "opt asan"
+            ASAN_OPTIONS: "detect_leaks=0"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+        max-run-time: 5400
+    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: asan-tc
+        mozconfig-variant: nightly-asan
+        tooltool-downloads: public
+        need-xvfb: true
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust-nightly
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-llvm-symbolizer
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+
+linux64-tsan/opt:
+    description: "Linux64 Opt TSAN"
+    index:
+        product: firefox
+        job-name: linux64-tsan-opt
+    treeherder:
+        platform: linux64/tsan
+        symbol: Bo
+    worker-type: b-linux
+    worker:
+        env:
+            PERFHERDER_EXTRA_OPTIONS: "opt tsan"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+        max-run-time: 5400
+    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: tsan-tc
+        mozconfig-variant: tsan
+        tooltool-downloads: public
+        need-xvfb: true
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust-nightly
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-llvm-symbolizer
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+
+linux64-tsan-fuzzing/opt:
+    description: "Linux64 Fuzzing Opt TSAN"
+    index:
+        product: firefox
+        job-name: linux64-fuzzing-tsan-opt
+    attributes:
+        # The gtest libxul contains libFuzzer targets
+        skip-verify-test-packaging: true
+    treeherder:
+        platform: linux64/tsan
+        symbol: Bof
+    worker-type: b-linux
+    worker:
+        env:
+            PERFHERDER_EXTRA_OPTIONS: tsan-fuzzing
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+        max-run-time: 5400
+    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-tsan-tc
+        mozconfig-variant: tsan-fuzzing
+        tooltool-downloads: public
+        need-xvfb: true
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust-nightly
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-llvm-symbolizer
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+    optimization:
+        skip-unless-expanded: null
+
+linux64-asan-fuzzing/opt:
+    description: "Linux64 Fuzzing Opt ASAN"
+    index:
+        product: firefox
+        job-name: linux64-fuzzing-asan-opt
+    attributes:
+        # The gtest libxul contains libFuzzer targets
+        skip-verify-test-packaging: true
+    treeherder:
+        platform: linux64/asan
+        symbol: Bof
+    worker-type: b-linux
+    worker:
+        env:
+            PERFHERDER_EXTRA_OPTIONS: asan-fuzzing
+            ASAN_OPTIONS: "detect_leaks=0"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+        max-run-time: 5400
+    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
+        tooltool-downloads: public
+        need-xvfb: true
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust-nightly
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-llvm-symbolizer
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+    optimization:
+        skip-unless-expanded: null
+
+linux64-asan-fuzzing-ccov/opt:
+    description: "Linux64 Fuzzing Opt ASAN w/ Coverage"
+    index:
+        product: firefox
+        job-name: linux64-ccov-fuzzing-asan-opt
+    attributes:
+        # The gtest libxul contains libFuzzer targets
+        skip-verify-test-packaging: true
+    treeherder:
+        platform: linux64/asan
+        symbol: Bocf
+    run-on-projects: ['mozilla-central']
+    worker-type: b-linux
+    worker:
+        env:
+            PERFHERDER_EXTRA_OPTIONS: asan-fuzzing-ccov
+            ASAN_OPTIONS: "detect_leaks=0"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+        max-run-time: 5400
+    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
+        mozconfig-variant: asan-fuzzing-ccov
+        tooltool-downloads: public
+        need-xvfb: true
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-llvm-symbolizer
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+
+linux64-fuzzing-ccov/opt:
+    description: "Linux64 Fuzzing Opt w/ Coverage"
+    index:
+        product: firefox
+        job-name: linux64-ccov-fuzzing-opt
+    treeherder:
+        platform: linux64/opt
+        symbol: Bocf
+    run-on-projects: ['mozilla-central']
+    worker-type: b-linux
+    worker:
+        max-run-time: 5400
+        env:
+            MOZ_LOW_PARALLELISM_BUILD: '1'
+            PERFHERDER_EXTRA_OPTIONS: fuzzing-ccov
+            FORCE_GCC: '1'
+            ASAN_OPTIONS: "detect_leaks=0"
+            RUSTC_BOOTSTRAP: '1'
+    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
+        mozconfig-variant: fuzzing-ccov
+        tooltool-downloads: public
+        need-xvfb: true
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-gcc-7
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+    optimization:
+        skip-unless-expanded: null
+
+linux64-asan-reporter-shippable/opt:
+    description: "Linux64 Opt ASAN Reporter (Shippable)"
+    attributes:
+        shippable: true
+    shipping-product:
+        by-release-type:
+            nightly: firefox
+            default: null
+    index:
+        product: firefox
+        job-name: linux64-asan-reporter-opt
+        type: shippable
+    treeherder:
+        platform: linux64-asan-reporter/opt
+        symbol: BoR
+    run-on-projects: ['mozilla-central']
+    worker-type: b-linux
+    worker:
+        env:
+            PERFHERDER_EXTRA_OPTIONS: asan-reporter
+            ASAN_OPTIONS: "detect_leaks=0"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+        max-run-time: 3600
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - taskcluster_nightly.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        custom-build-variant-cfg: asan-reporter-tc
+        mozconfig-variant: nightly-asan-reporter
+        tooltool-downloads: public
+        need-xvfb: true
+        mar-channel-id:
+            firefox-mozilla-central-asan
+        accepted-mar-channel-ids:
+            firefox-mozilla-central-asan
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-llvm-symbolizer
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+
+linux64-asan/debug:
+    description: "Linux64 Debug ASAN"
+    index:
+        product: firefox
+        job-name: linux64-asan-debug
+    treeherder:
+        platform: linux64/asan
+        symbol: Bd
+    worker-type: b-linux
+    worker:
+        env:
+            PERFHERDER_EXTRA_OPTIONS: "debug asan"
+            ASAN_OPTIONS: "detect_leaks=0"
+        max-run-time: 5400
+    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: asan-tc-and-debug
+        mozconfig-variant: debug-asan
+        tooltool-downloads: public
+        need-xvfb: true
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust-nightly
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-llvm-symbolizer
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+            # `fix-stacks` is needed because xpcshell self tests run as part of
+            # the build step. Once bug 1614626 moves them to the xpcshell task,
+            # this dependency can be removed.
+            - linux64-fix-stacks
+    optimization:
+        skip-unless-expanded: null
+
+linux64-shippable/opt:
+    description: "Linux64 Shippable"
+    use-pgo: true
+    attributes:
+        shippable: true
+        enable-full-crashsymbols: true
+    shipping-phase: build
+    shipping-product: firefox
+    index:
+        product: firefox
+        job-name: linux64-opt
+        type: shippable
+    treeherder:
+        platform: linux64-shippable/opt
+        symbol: Bpgo(B)
+    run-on-projects: ['release']
+    worker-type: b-linux
+    worker:
+        max-run-time: 9000
+        env:
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - taskcluster_nightly.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        tooltool-downloads: public
+        need-xvfb: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+
+linux64-noopt/debug:
+    description: "Linux64 No-optimize Debug"
+    index:
+        product: firefox
+        job-name: linux64-noopt-debug
+    treeherder:
+        platform: linux64-noopt/debug
+        symbol: B
+        tier: 2
+    attributes:
+        enable-full-crashsymbols: true
+    worker-type: b-linux
+    worker:
+        max-run-time: 5400
+    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: noopt-debug
+        mozconfig-variant: noopt-debug
+        tooltool-downloads: public
+        keep-artifacts: false
+        need-xvfb: true
+    run-on-projects: ['mozilla-central']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+            # `fix-stacks` is needed because xpcshell self tests run as part of
+            # the build step. Once bug 1614626 moves them to the xpcshell task,
+            # this dependency can be removed.
+            - linux64-fix-stacks
+
+linux64-rusttests/opt:
+    description: "Linux64 Rust Tests Opt"
+    index:
+        product: firefox
+        job-name: linux64-rusttests-opt
+    treeherder:
+        platform: linux64/opt
+        symbol: BR
+        tier: 1
+    worker-type: b-linux
+    worker:
+        max-run-time: 2700
+        env:
+            PERFHERDER_EXTRA_OPTIONS: rusttests
+    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: rusttests
+        mozconfig-variant: rusttests
+        tooltool-downloads: public
+        keep-artifacts: false
+    run-on-projects: ['mozilla-central']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+    optimization:
+        test-inclusive: [rusttests]
+
+linux64-rusttests/debug:
+    description: "Linux64 Rust Tests Debug"
+    index:
+        product: firefox
+        job-name: linux64-rusttests-debug
+    treeherder:
+        platform: linux64/debug
+        symbol: BR
+        tier: 1
+    worker-type: b-linux
+    worker:
+        max-run-time: 2700
+        env:
+            PERFHERDER_EXTRA_OPTIONS: rusttests
+    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: rusttests-debug
+        mozconfig-variant: rusttests-debug
+        tooltool-downloads: public
+        keep-artifacts: false
+    run-on-projects: ['trunk']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+    optimization:
+        test-inclusive: [rusttests]
+
+linux64-ccov/opt:
+    description: "Linux64-CCov Opt"
+    index:
+        product: firefox
+        job-name: linux64-ccov-opt
+    treeherder:
+        platform: linux64-ccov/opt
+        symbol: B
+        tier: 2
+    run-on-projects: ['mozilla-central']
+    worker-type: b-linux
+    worker:
+        artifacts:
+            - name: public/code-coverage-grcov.zip
+              path: /builds/worker/workspace/obj-build/code-coverage-grcov.zip
+              type: file
+        max-run-time: 7200
+        env:
+            MOZ_LOW_PARALLELISM_BUILD: '1'
+            FORCE_GCC: '1'
+            RUSTC_BOOTSTRAP: '1'
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    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: code-coverage-opt
+        mozconfig-variant: code-coverage-opt
+        tooltool-downloads: public
+        need-xvfb: true
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-gcc-7
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-grcov
+            - linux64-lucetc
+            - wasi-sysroot
+
+linux64-add-on-devel/opt:
+    description: "Linux64 add-on-devel"
+    index:
+        product: firefox
+        job-name: linux64-add-on-devel
+    treeherder:
+        platform: linux64-add-on-devel/opt
+        symbol: B
+        tier: 2
+    worker-type: b-linux
+    worker:
+        max-run-time: 3600
+    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: add-on-devel
+        mozconfig-variant: add-on-devel
+        tooltool-downloads: public
+        need-xvfb: true
+    run-on-projects: ['mozilla-beta', 'mozilla-release']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+
+linux64-aarch64/opt:
+    description: "Linux64 aarch64 Opt"
+    index:
+        product: firefox
+        job-name: linux64-aarch64-opt
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: linux64-aarch64/opt
+        symbol: B
+        tier: 2
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-arm64-build}
+        max-run-time: 7200
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+        extra-config:
+            mozconfig_platform: linux64-aarch64
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        mozconfig-variant: opt
+        tooltool-downloads: public
+        need-xvfb: true
+    run-on-projects: ['integration']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-aarch64-cross
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+    optimization:
+        skip-unless-expanded: null
+
+linux-gcp/debug:
+    description: "Linux32 Debug - built on GCP"
+    index:
+        product: firefox
+        job-name: linux-gcp-debug
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: linux32/debug
+        symbol: Bg
+        tier: 3
+    worker-type: b-linux-gcp
+    worker:
+        docker-image: {in-tree: debian8-i386-build}
+        max-run-time: 5400
+        env:
+            PERFHERDER_EXTRA_OPTIONS: gcp
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_32_builds.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        custom-build-variant-cfg: debug
+        mozconfig-variant: debug
+        tooltool-downloads: public
+        need-xvfb: true
+    run-on-projects: ['release']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+            # `fix-stacks` is needed because xpcshell self tests run as part of
+            # the build step. Once bug 1614626 moves them to the xpcshell task,
+            # this dependency can be removed.
+            - linux64-fix-stacks
+    optimization:
+        skip-unless-backstop: null
+
+linux-gcp/opt:
+    description: "Linux32 Opt - built on GCP"
+    index:
+        product: firefox
+        job-name: linux-gcp-opt
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: linux32/opt
+        symbol: Bg
+        tier: 3
+    worker-type: b-linux-gcp
+    worker:
+        docker-image: {in-tree: debian8-i386-build}
+        max-run-time: 7200
+        env:
+            PERFHERDER_EXTRA_OPTIONS: gcp
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_32_builds.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        tooltool-downloads: public
+        need-xvfb: true
+    run-on-projects: ['release']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+
+linux64-gcp/debug:
+    description: "Linux64 Debug - built on GCP"
+    index:
+        product: firefox
+        job-name: linux64-gcp-debug
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: linux64/debug
+        symbol: Bg
+        tier: 3
+    worker-type: b-linux-gcp
+    worker:
+        max-run-time: 5400
+        env:
+            PERFHERDER_EXTRA_OPTIONS: gcp
+    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: debug
+        mozconfig-variant: debug
+        tooltool-downloads: public
+        need-xvfb: true
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
+            # `fix-stacks` is needed because xpcshell self tests run as part of
+            # the build step. Once bug 1614626 moves them to the xpcshell task,
+            # this dependency can be removed.
+            - linux64-fix-stacks
+    optimization:
+        skip-unless-backstop: null
+
+linux64-gcp/opt:
+    description: "Linux64 Opt - built on GCP"
+    index:
+        product: firefox
+        job-name: linux64-gcp-opt
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: linux64/opt
+        symbol: Bg
+        tier: 3
+    worker-type: b-linux-gcp
+    worker:
+        max-run-time: 7200
+        env:
+            PERFHERDER_EXTRA_OPTIONS: gcp
+    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
+        tooltool-downloads: public
+        need-xvfb: true
+    run-on-projects: ['mozilla-central']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-sccache
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+            - wasi-sysroot
diff --git a/taskcluster/ci/build/macosx-native.yml b/taskcluster/ci/build/macosx-native.yml
new file mode 100644
index 0000000000..361f9cf5e0
--- /dev/null
+++ b/taskcluster/ci/build/macosx-native.yml
@@ -0,0 +1,75 @@
+# 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/.
+---
+job-defaults:
+    index:
+        product: firefox
+    worker-type: b-osx-1015
+    worker:
+        max-run-time: 7200
+    run:
+        using: mozharness
+        script: "mozharness/scripts/fx_desktop_build.py"
+
+macosx64-plain/opt:
+    description: "MacOS X x64 Opt Plain"
+    index:
+        job-name: macosx64-plain-opt
+    treeherder:
+        symbol: Bp
+        platform: osx/opt
+        tier: 2
+    worker:
+        env:
+            PERFHERDER_EXTRA_OPTIONS: plain
+    run:
+        actions: [build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/taskcluster_base_macosx.py
+        extra-config:
+            disable_package_metrics: true
+            stage_platform: macosx64
+            mozconfig_platform: macosx64
+        mozconfig-variant: plain-opt
+    run-on-projects: ['mozilla-central']
+    fetches:
+        toolchain:
+            - macosx64-cbindgen
+            - macosx64-nasm
+            - macosx64-node
+            - macosx64-rust
+    optimization:
+        skip-unless-expanded: null
+
+macosx64-plain/debug:
+    description: "MacOS X x64 Debug Plain"
+    index:
+        job-name: macosx64-plain-debug
+    treeherder:
+        symbol: Bp
+        platform: osx/debug
+        tier: 2
+    worker:
+        env:
+            PERFHERDER_EXTRA_OPTIONS: plain
+    run:
+        actions: [build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/taskcluster_base_macosx.py
+        extra-config:
+            disable_package_metrics: true
+            stage_platform: macosx64
+            mozconfig_platform: macosx64
+        mozconfig-variant: plain-debug
+    run-on-projects: ['trunk']
+    fetches:
+        toolchain:
+            - macosx64-cbindgen
+            - macosx64-nasm
+            - macosx64-node
+            - macosx64-rust
+    optimization:
+        skip-unless-expanded: null
diff --git a/taskcluster/ci/build/macosx.yml b/taskcluster/ci/build/macosx.yml
new file mode 100644
index 0000000000..7e5e2c8933
--- /dev/null
+++ b/taskcluster/ci/build/macosx.yml
@@ -0,0 +1,698 @@
+# 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/.
+---
+job-defaults:
+    index:
+        product: firefox
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/macosx64/cross-releng.manifest"
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        secrets: true
+        script: "mozharness/scripts/fx_desktop_build.py"
+        tooltool-downloads: internal
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-dump-syms
+            - linux64-hfsplus
+            - linux64-libdmg
+            - linux64-llvm-dsymutil
+            - linux64-rust-macos
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-nasm
+            - linux64-node
+            - linux64-lucetc
+
+macosx64/debug:
+    description: "MacOS X x64 Cross-compile"
+    index:
+        job-name: macosx64-debug
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: osx-cross/debug
+        symbol: B
+        tier: 1
+    worker:
+        max-run-time: 5400
+        env:
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_mac_64_cross_builds.py
+        custom-build-variant-cfg: cross-debug
+        mozconfig-variant: debug
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-cctools-port
+            - linux64-clang-macosx-cross
+            - linux64-sccache
+            - wasi-sysroot
+
+macosx64/opt:
+    description: "MacOS X x64 Cross-compile"
+    index:
+        job-name: macosx64-opt
+    attributes:
+        enable-build-signing: true
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: osx-cross/opt
+        symbol: B
+        tier: 1
+    worker:
+        max-run-time: 7200
+        env:
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_mac_64_cross_builds.py
+    run-on-projects: ['integration']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-cctools-port
+            - linux64-clang-macosx-cross
+            - linux64-sccache
+            - wasi-sysroot
+
+macosx64-asan-fuzzing/opt:
+    description: "MacOS X x64 Cross-compile Fuzzing ASAN"
+    index:
+        job-name: macosx64-fuzzing-asan-opt
+    treeherder:
+        platform: osx-cross/asan
+        symbol: Bof
+    worker:
+        max-run-time: 5400
+        env:
+            PERFHERDER_EXTRA_OPTIONS: asan-fuzzing
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_mac_64_cross_builds.py
+        custom-build-variant-cfg: cross-fuzzing-asan
+        mozconfig-variant: nightly-fuzzing-asan
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-cctools-port
+            - linux64-clang-macosx-cross
+            - linux64-sccache
+            - macosx64-llvm-symbolizer
+            - wasi-sysroot
+    optimization:
+        skip-unless-expanded: null
+
+macosx64-fuzzing/debug:
+    description: "MacOS X x64 Cross-compile Fuzzing Debug"
+    index:
+        job-name: macosx64-fuzzing-debug
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: osx-cross/debug
+        symbol: Bf
+    worker:
+        max-run-time: 5400
+        env:
+            PERFHERDER_EXTRA_OPTIONS: fuzzing
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_mac_64_cross_builds.py
+        custom-build-variant-cfg: cross-fuzzing-debug
+        mozconfig-variant: debug-fuzzing
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-cctools-port
+            - linux64-clang-macosx-cross
+            - linux64-sccache
+            - wasi-sysroot
+    optimization:
+        skip-unless-expanded: null
+
+macosx64-x64-devedition/opt:
+    description: "MacOS X Dev Edition x64 (shippable)"
+    use-pgo: macosx64-shippable/opt
+    attributes:
+        enable-full-crashsymbols: true
+        skip-verify-test-packaging: true
+    shipping-phase: build
+    shipping-product: devedition
+    index:
+        product: devedition
+        job-name: macosx64-x64-opt
+        type: shippable
+    treeherder:
+        platform: osx-cross-devedition/opt
+        symbol: Bx
+        tier: 1
+    worker:
+        max-run-time: 7200
+        env:
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_mac_64_cross_builds.py
+            - taskcluster_nightly.py
+        extra-config:
+            stage_platform: macosx64-devedition
+        mozconfig-variant: devedition
+    run-on-projects: ['mozilla-beta']
+    fetches:
+        toolchain:
+            - linux64-cctools-port
+            - linux64-clang-macosx-cross
+            - wasi-sysroot
+
+macosx64-aarch64-devedition/opt:
+    description: "MacOS X Dev Edition Aarch64 (shippable)"
+    use-pgo: macosx64-shippable/opt
+    attributes:
+        enable-full-crashsymbols: true
+        skip-verify-test-packaging: true
+    shipping-phase: build
+    shipping-product: devedition
+    index:
+        product: devedition
+        job-name: macosx64-aarch64-opt
+        type: shippable
+    treeherder:
+        platform: osx-aarch64-devedition/opt
+        symbol: B
+        tier: 1
+    worker:
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: ""
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+            PERFHERDER_EXTRA_OPTIONS: aarch64
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_mac_64_cross_builds.py
+            - taskcluster_nightly.py
+        extra-config:
+            stage_platform: macosx64-aarch64-devedition
+            mozconfig_platform: macosx64-aarch64
+        mozconfig-variant: devedition
+    run-on-projects: ['mozilla-beta']
+    fetches:
+        toolchain:
+            - linux64-cctools-port
+            - linux64-clang-macosx-cross
+            - macosx64-sdk-11.0
+
+macosx64-devedition/opt:
+    description: "MacOS X Dev Edition Universal"
+    attributes:
+        shippable: true
+        enable-build-signing: true
+        skip-upload-crashsymbols: true
+        skip-verify-test-packaging: true
+    shipping-phase: build
+    shipping-product: devedition
+    index:
+        product: devedition
+        job-name: macosx64-opt
+        type: shippable
+    treeherder:
+        platform: osx-cross-devedition/opt
+        symbol: B
+        tier: 1
+    run-on-projects: ['mozilla-beta']
+    worker:
+        max-run-time: 1800
+    run:
+        job-script: taskcluster/scripts/misc/unify.sh
+        config:
+            - builds/releng_base_firefox.py
+    dependencies:
+        macosx64-x64-devedition-opt: build-macosx64-x64-devedition/opt
+        macosx64-aarch64-devedition-opt: build-macosx64-aarch64-devedition/opt
+    fetches:
+        macosx64-x64-devedition-opt:
+            - artifact: target.dmg
+              extract: false
+              dest: x64
+            - artifact: buildhub.json
+              extract: false
+              dest: ../artifacts
+            - artifact: host/bin/mar
+              extract: false
+              dest: ../artifacts/host/bin
+            - artifact: host/bin/mbsdiff
+              extract: false
+              dest: ../artifacts/host/bin
+            - artifact: target.txt
+              extract: false
+              dest: ../artifacts
+            - artifact: target_info.txt
+              extract: false
+              dest: ../artifacts
+            - artifact: target.json
+              extract: false
+              dest: ../artifacts
+            - artifact: target.mozinfo.json
+              extract: false
+              dest: ../artifacts
+            - artifact: target.test_packages.json
+              extract: false
+              dest: ../artifacts
+            - artifact: target.perftests.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.common.tests.tar.gz
+              dest: x64/common
+            - artifact: target.cppunittest.tests.tar.gz
+              dest: x64/cppunittest
+            - artifact: target.gtest.tests.tar.gz
+              dest: x64/gtest
+            - artifact: target.jittest.tests.tar.gz
+              dest: x64/jittest
+            - artifact: target.jsreftest.tests.tar.gz
+              dest: x64/jsreftest
+            - artifact: target.mochitest.tests.tar.gz
+              dest: x64/mochitest
+            - artifact: target.reftest.tests.tar.gz
+              dest: x64/reftest
+            - artifact: target.talos.tests.tar.gz
+              dest: x64/talos
+            - artifact: target.raptor.tests.tar.gz
+              dest: x64/raptor
+            - artifact: target.condprof.tests.tar.gz
+              dest: x64/confprof
+            - artifact: target.awsy.tests.tar.gz
+              dest: x64/awsy
+            - artifact: target.xpcshell.tests.tar.gz
+              dest: x64/xpcshell
+            - artifact: target.web-platform.tests.tar.gz
+              dest: x64/web-platform
+            - artifact: target.updater-dep.tests.tar.gz
+              dest: x64/updater-dep
+            - artifact: target.crashreporter-symbols.zip
+              dest: x64/crashreporter-symbols
+            - artifact: target.jsshell.zip
+              dest: x64/jsshell
+            - artifact: target.generated-files.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.langpack.xpi
+              extract: false
+              dest: ../artifacts
+            - artifact: mozharness.zip
+              extract: false
+              dest: ../artifacts
+        macosx64-aarch64-devedition-opt:
+            - artifact: target.dmg
+              extract: false
+              dest: aarch64
+            - artifact: target.common.tests.tar.gz
+              dest: aarch64/common
+            - artifact: target.cppunittest.tests.tar.gz
+              dest: aarch64/cppunittest
+            - artifact: target.gtest.tests.tar.gz
+              dest: aarch64/gtest
+            - artifact: target.jittest.tests.tar.gz
+              dest: aarch64/jittest
+            - artifact: target.jsreftest.tests.tar.gz
+              dest: aarch64/jsreftest
+            - artifact: target.mochitest.tests.tar.gz
+              dest: aarch64/mochitest
+            - artifact: target.reftest.tests.tar.gz
+              dest: aarch64/reftest
+            - artifact: target.talos.tests.tar.gz
+              dest: aarch64/talos
+            - artifact: target.raptor.tests.tar.gz
+              dest: aarch64/raptor
+            - artifact: target.condprof.tests.tar.gz
+              dest: aarch64/confprof
+            - artifact: target.awsy.tests.tar.gz
+              dest: aarch64/awsy
+            - artifact: target.xpcshell.tests.tar.gz
+              dest: aarch64/xpcshell
+            - artifact: target.web-platform.tests.tar.gz
+              dest: aarch64/web-platform
+            - artifact: target.updater-dep.tests.tar.gz
+              dest: aarch64/updater-dep
+            - artifact: target.crashreporter-symbols.zip
+              dest: aarch64/crashreporter-symbols
+            - artifact: target.jsshell.zip
+              dest: aarch64/jsshell
+        toolchain:
+            - linux64-cctools-port
+
+macosx64-noopt/debug:
+    description: "MacOS X x64 No-optimize Debug"
+    index:
+        job-name: macosx64-noopt-debug
+    treeherder:
+        platform: osx-cross-noopt/debug
+        symbol: B
+        tier: 2
+    worker:
+        max-run-time: 3600
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_mac_64_cross_builds.py
+        custom-build-variant-cfg: cross-noopt-debug
+        mozconfig-variant: cross-noopt-debug
+        keep-artifacts: false
+    run-on-projects: ['mozilla-central']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-cctools-port
+            - linux64-clang-macosx-cross
+            - linux64-sccache
+            - wasi-sysroot
+
+macosx64-add-on-devel/opt:
+    description: "MacOS X x64 add-on-devel"
+    index:
+        job-name: macosx64-add-on-devel
+    treeherder:
+        platform: osx-cross-add-on-devel/opt
+        symbol: B
+        tier: 2
+    worker:
+        max-run-time: 3600
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_mac_64_cross_builds.py
+        custom-build-variant-cfg: add-on-devel
+        mozconfig-variant: add-on-devel
+    run-on-projects: ['mozilla-beta', 'mozilla-release']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-cctools-port
+            - linux64-clang-macosx-cross
+            - linux64-sccache
+            - wasi-sysroot
+
+macosx64-x64-shippable/opt:
+    description: "MacOS X x64 Cross-compile"
+    use-pgo: macosx64-shippable/opt
+    attributes:
+        enable-full-crashsymbols: true
+        skip-verify-test-packaging: true
+    shipping-phase: build
+    shipping-product: firefox
+    index:
+        job-name: macosx64-x64-opt
+        type: shippable
+    treeherder:
+        platform: osx-shippable/opt
+        symbol: Bpgo(Bx)
+        tier: 1
+    run-on-projects: ['release']
+    worker:
+        max-run-time: 7200
+        env:
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_mac_64_cross_builds.py
+            - taskcluster_nightly.py
+    fetches:
+        toolchain:
+            - linux64-cctools-port
+            - linux64-clang-macosx-cross
+            - wasi-sysroot
+
+macosx64-aarch64-shippable/opt:
+    description: "MacOS X aarch64 Cross-compile"
+    use-pgo: macosx64-shippable/opt
+    attributes:
+        enable-full-crashsymbols: true
+        skip-verify-test-packaging: true
+    shipping-phase: build
+    shipping-product: firefox
+    index:
+        job-name: macosx64-aarch64-opt
+        type: shippable
+    treeherder:
+        platform: osx-aarch64-shippable/opt
+        symbol: Bpgo(B)
+        tier: 1
+    run-on-projects: ['release']
+    worker:
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: ""
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+            PERFHERDER_EXTRA_OPTIONS: aarch64
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_mac_64_cross_builds.py
+            - taskcluster_nightly.py
+        extra-config:
+            mozconfig_platform: macosx64-aarch64
+    fetches:
+        toolchain:
+            - linux64-cctools-port
+            - linux64-clang-macosx-cross
+            - macosx64-sdk-11.0
+
+macosx64-shippable/opt:
+    description: "MacOS X Universal"
+    attributes:
+        shippable: true
+        enable-build-signing: true
+        skip-upload-crashsymbols: true
+        skip-verify-test-packaging: true
+    shipping-phase: build
+    shipping-product: firefox
+    index:
+        job-name: macosx64-opt
+        type: shippable
+    treeherder:
+        platform: osx-shippable/opt
+        symbol: Bpgo(B)
+        tier: 1
+    run-on-projects: ['release']
+    worker:
+        max-run-time: 1800
+    run:
+        job-script: taskcluster/scripts/misc/unify.sh
+        config:
+            - builds/releng_base_firefox.py
+    dependencies:
+        macosx64-x64-shippable-opt: build-macosx64-x64-shippable/opt
+        macosx64-aarch64-shippable-opt: build-macosx64-aarch64-shippable/opt
+    fetches:
+        macosx64-x64-shippable-opt:
+            - artifact: target.dmg
+              extract: false
+              dest: x64
+            - artifact: buildhub.json
+              extract: false
+              dest: ../artifacts
+            - artifact: host/bin/mar
+              extract: false
+              dest: ../artifacts/host/bin
+            - artifact: host/bin/mbsdiff
+              extract: false
+              dest: ../artifacts/host/bin
+            - artifact: target.txt
+              extract: false
+              dest: ../artifacts
+            - artifact: target_info.txt
+              extract: false
+              dest: ../artifacts
+            - artifact: target.json
+              extract: false
+              dest: ../artifacts
+            - artifact: target.mozinfo.json
+              extract: false
+              dest: ../artifacts
+            - artifact: target.test_packages.json
+              extract: false
+              dest: ../artifacts
+            - artifact: target.perftests.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.common.tests.tar.gz
+              dest: x64/common
+            - artifact: target.cppunittest.tests.tar.gz
+              dest: x64/cppunittest
+            - artifact: target.gtest.tests.tar.gz
+              dest: x64/gtest
+            - artifact: target.jittest.tests.tar.gz
+              dest: x64/jittest
+            - artifact: target.jsreftest.tests.tar.gz
+              dest: x64/jsreftest
+            - artifact: target.mochitest.tests.tar.gz
+              dest: x64/mochitest
+            - artifact: target.reftest.tests.tar.gz
+              dest: x64/reftest
+            - artifact: target.talos.tests.tar.gz
+              dest: x64/talos
+            - artifact: target.raptor.tests.tar.gz
+              dest: x64/raptor
+            - artifact: target.condprof.tests.tar.gz
+              dest: x64/confprof
+            - artifact: target.awsy.tests.tar.gz
+              dest: x64/awsy
+            - artifact: target.xpcshell.tests.tar.gz
+              dest: x64/xpcshell
+            - artifact: target.web-platform.tests.tar.gz
+              dest: x64/web-platform
+            - artifact: target.updater-dep.tests.tar.gz
+              dest: x64/updater-dep
+            - artifact: target.crashreporter-symbols.zip
+              dest: x64/crashreporter-symbols
+            - artifact: target.jsshell.zip
+              dest: x64/jsshell
+            - artifact: target.generated-files.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.langpack.xpi
+              extract: false
+              dest: ../artifacts
+            - artifact: mozharness.zip
+              extract: false
+              dest: ../artifacts
+        macosx64-aarch64-shippable-opt:
+            - artifact: target.dmg
+              extract: false
+              dest: aarch64
+            - artifact: target.common.tests.tar.gz
+              dest: aarch64/common
+            - artifact: target.cppunittest.tests.tar.gz
+              dest: aarch64/cppunittest
+            - artifact: target.gtest.tests.tar.gz
+              dest: aarch64/gtest
+            - artifact: target.jittest.tests.tar.gz
+              dest: aarch64/jittest
+            - artifact: target.jsreftest.tests.tar.gz
+              dest: aarch64/jsreftest
+            - artifact: target.mochitest.tests.tar.gz
+              dest: aarch64/mochitest
+            - artifact: target.reftest.tests.tar.gz
+              dest: aarch64/reftest
+            - artifact: target.talos.tests.tar.gz
+              dest: aarch64/talos
+            - artifact: target.raptor.tests.tar.gz
+              dest: aarch64/raptor
+            - artifact: target.condprof.tests.tar.gz
+              dest: aarch64/confprof
+            - artifact: target.awsy.tests.tar.gz
+              dest: aarch64/awsy
+            - artifact: target.xpcshell.tests.tar.gz
+              dest: aarch64/xpcshell
+            - artifact: target.web-platform.tests.tar.gz
+              dest: aarch64/web-platform
+            - artifact: target.updater-dep.tests.tar.gz
+              dest: aarch64/updater-dep
+            - artifact: target.crashreporter-symbols.zip
+              dest: aarch64/crashreporter-symbols
+            - artifact: target.jsshell.zip
+              dest: aarch64/jsshell
+        toolchain:
+            - linux64-cctools-port
+
+macosx64-ccov/opt:
+    description: "MacOS X x64 Cross-compile Code Coverage"
+    index:
+        job-name: macosx64-ccov-opt
+    treeherder:
+        platform: osx-cross-ccov/opt
+        symbol: B
+        tier: 1
+    worker:
+        max-run-time: 7200
+        env:
+            RUSTC_BOOTSTRAP: '1'
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_mac_64_cross_builds.py
+        custom-build-variant-cfg: code-coverage-opt
+        mozconfig-variant: code-coverage
+    run-on-projects: ['mozilla-central']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-cctools-port
+            - linux64-clang-macosx-cross
+            - linux64-sccache
+            - wasi-sysroot
+
+macosx64-gcp/debug:
+    description: "MacOS X x64 Cross-compile - built on GCP"
+    index:
+        job-name: macosx64-gcp-debug
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: osx-cross/debug
+        symbol: Bg
+        tier: 3
+    worker-type: b-linux-gcp
+    worker:
+        max-run-time: 3600
+        env:
+            PERFHERDER_EXTRA_OPTIONS: gcp
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_mac_64_cross_builds.py
+        custom-build-variant-cfg: cross-debug
+        mozconfig-variant: debug
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-cctools-port
+            - linux64-clang-macosx-cross
+            - linux64-sccache
+            - wasi-sysroot
+    optimization:
+        skip-unless-backstop: null
+
+macosx64-gcp/opt:
+    description: "MacOS X x64 Cross-compile - built on GCP"
+    index:
+        job-name: macosx64-gcp-opt
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: osx-cross/opt
+        symbol: Bg
+        tier: 3
+    worker-type: b-linux-gcp
+    worker:
+        max-run-time: 7200
+        env:
+            PERFHERDER_EXTRA_OPTIONS: gcp
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_mac_64_cross_builds.py
+    run-on-projects: ['mozilla-central']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-cctools-port
+            - linux64-clang-macosx-cross
+            - linux64-sccache
+            - wasi-sysroot
diff --git a/taskcluster/ci/build/windows-mingw.yml b/taskcluster/ci/build/windows-mingw.yml
new file mode 100644
index 0000000000..608c52eb3b
--- /dev/null
+++ b/taskcluster/ci/build/windows-mingw.yml
@@ -0,0 +1,156 @@
+# 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/.
+---
+job-defaults:
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: mingw32-build}
+        max-run-time: 7200
+    run:
+        using: mozharness
+        actions: [build]
+        script: mozharness/scripts/fx_desktop_build.py
+        need-xvfb: false
+    optimization:
+        skip-unless-expanded: null
+
+win32-mingwclang/opt:
+    description: "Win32 MinGW-Clang Opt"
+    index:
+        product: firefox
+        job-name: win32-mingwclang-opt
+    treeherder:
+        platform: windows-mingw32/all
+        symbol: WMC32(Bo)
+        tier: 2
+    worker:
+        env:
+            PERFHERDER_EXTRA_OPTIONS: "opt 32 clang"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_windows_32_mingw_builds.py
+            - builds/releng_sub_windows_configs/32_mingwclang.py
+        mozconfig-variant: mingwclang
+    run-on-projects: ['mozilla-central', 'mozilla-esr78']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - mingw32-rust
+            - linux64-upx
+            - linux64-wine
+            - linux64-sccache
+            - linux64-cbindgen
+            - linux64-nasm
+            - linux64-node
+            - linux64-clang-mingw-x86
+            - linux64-mingw32-nsis
+            - linux64-mingw-fxc2-x86
+            - linux64-dump-syms
+
+win32-mingwclang/debug:
+    description: "Win32 MinGW-Clang Debug"
+    index:
+        product: firefox
+        job-name: win32-mingwclang-debug
+    treeherder:
+        platform: windows-mingw32/all
+        symbol: WMC32(Bd)
+        tier: 2
+    worker:
+        env:
+            PERFHERDER_EXTRA_OPTIONS: "debug 32 clang"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_windows_32_mingw_builds.py
+            - builds/releng_sub_windows_configs/32_mingwclang.py
+        mozconfig-variant: mingwclang-debug
+    run-on-projects: ['mozilla-central', 'mozilla-esr78']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - mingw32-rust
+            - linux64-upx
+            - linux64-wine
+            - linux64-sccache
+            - linux64-cbindgen
+            - linux64-nasm
+            - linux64-node
+            - linux64-clang-mingw-x86
+            - linux64-mingw32-nsis
+            - linux64-mingw-fxc2-x86
+            - linux64-dump-syms
+
+win64-mingwclang/opt:
+    description: "Win64 MinGW-Clang Opt"
+    index:
+        product: firefox
+        job-name: win64-mingwclang-opt
+    treeherder:
+        platform: windows-mingw32/all
+        symbol: WMC64(Bo)
+        tier: 2
+    worker:
+        env:
+            PERFHERDER_EXTRA_OPTIONS: "opt 64 clang"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_windows_64_mingw_builds.py
+            - builds/releng_sub_windows_configs/64_mingwclang.py
+        mozconfig-variant: mingwclang
+    run-on-projects: ['mozilla-central', 'mozilla-esr78']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - mingw32-rust
+            - linux64-upx
+            - linux64-wine
+            - linux64-sccache
+            - linux64-cbindgen
+            - linux64-nasm
+            - linux64-node
+            - linux64-clang-mingw-x64
+            - linux64-mingw32-nsis
+            - linux64-mingw-fxc2-x86
+            - linux64-dump-syms
+
+win64-mingwclang/debug:
+    description: "Win64 MinGW-Clang Debug"
+    index:
+        product: firefox
+        job-name: win64-mingwclang-debug
+    treeherder:
+        platform: windows-mingw32/all
+        symbol: WMC64(Bd)
+        tier: 2
+    worker:
+        env:
+            PERFHERDER_EXTRA_OPTIONS: "debug 64 clang"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_windows_64_mingw_builds.py
+            - builds/releng_sub_windows_configs/64_mingwclang.py
+        mozconfig-variant: mingwclang-debug
+    run-on-projects: ['mozilla-central', 'mozilla-esr78']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - mingw32-rust
+            - linux64-upx
+            - linux64-wine
+            - linux64-sccache
+            - linux64-cbindgen
+            - linux64-nasm
+            - linux64-node
+            - linux64-clang-mingw-x64
+            - linux64-mingw32-nsis
+            - linux64-mingw-fxc2-x86
+            - linux64-dump-syms
diff --git a/taskcluster/ci/build/windows.yml b/taskcluster/ci/build/windows.yml
new file mode 100644
index 0000000000..630e31819f
--- /dev/null
+++ b/taskcluster/ci/build/windows.yml
@@ -0,0 +1,1717 @@
+# 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/.
+---
+job-defaults:
+    run:
+        using: mozharness
+        tooltool-downloads: internal
+    fetches:
+        toolchain:
+            - win64-dump-syms
+            - win64-pdbstr
+
+win32/debug:
+    description: "Win32 Debug"
+    index:
+        product: firefox
+        job-name: win32-debug
+    attributes:
+        enable-build-signing: true
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: windows2012-32/debug
+        symbol: B
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        options: [append-env-variables-from-configs]
+        actions: [get-secrets, build]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - builds/taskcluster_sub_win32/debug.py
+        mozconfig-variant: debug
+        extra-config:
+            mozconfig_platform: win32
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-sccache
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+
+win32/opt:
+    description: "Win32 Opt"
+    index:
+        product: firefox
+        job-name: win32-opt
+    attributes:
+        enable-build-signing: true
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: windows2012-32/opt
+        symbol: B
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        options: [append-env-variables-from-configs]
+        actions: [get-secrets, build]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+        extra-config:
+            stage_platform: win32
+            mozconfig_platform: win32
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+    run-on-projects: ['integration']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-sccache
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+
+win64/debug:
+    description: "Win64 Debug"
+    index:
+        product: firefox
+        job-name: win64-debug
+    attributes:
+        enable-build-signing: true
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: windows2012-64/debug
+        symbol: B
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        options: [append-env-variables-from-configs]
+        actions: [get-secrets, build]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - builds/taskcluster_sub_win64/debug.py
+        mozconfig-variant: debug
+        extra-config:
+            mozconfig_platform: win64
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-sccache
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+
+win64-fuzzing/debug:
+    description: "Win64 Fuzzing Debug"
+    index:
+        product: firefox
+        job-name: win64-fuzzing-debug
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: windows2012-64/debug
+        symbol: Bf
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            PERFHERDER_EXTRA_OPTIONS: fuzzing
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - builds/taskcluster_sub_win64/debug.py
+        extra-config:
+            mozconfig_platform: win64
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+        mozconfig-variant: debug-fuzzing
+    run-on-projects: ['trunk']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-sccache
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+    optimization:
+        skip-unless-expanded: null
+
+win64-plain/debug:
+    description: "Win64 Debug Plain"
+    index:
+        product: firefox
+        job-name: win64-plain-debug
+    treeherder:
+        platform: windows2012-64/debug
+        symbol: Bp
+        tier: 2
+    worker-type: b-win2012
+    worker:
+        max-run-time: 7200
+        env:
+            PERFHERDER_EXTRA_OPTIONS: plain
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
+    run:
+        actions: [build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        config:
+            - builds/releng_base_firefox.py
+            - builds/taskcluster_base_windows.py
+            - builds/taskcluster_base_win64.py
+        extra-config:
+            disable_package_metrics: true
+            stage_platform: win64
+        mozconfig-variant: plain-debug
+    run-on-projects: ['trunk']
+    fetches:
+        toolchain:
+            - win64-clang-cl
+            - win64-rust
+            - win64-node
+            - win64-nasm
+            - win64-cbindgen
+            - win64-winchecksec
+    optimization:
+        skip-unless-expanded: null
+
+win64/opt:
+    description: "Win64 Opt"
+    index:
+        product: firefox
+        job-name: win64-opt
+    attributes:
+        enable-build-signing: true
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: windows2012-64/opt
+        symbol: B
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        options: [append-env-variables-from-configs]
+        actions: [get-secrets, build]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+        extra-config:
+            stage_platform: win64
+            mozconfig_platform: win64
+            env:
+                # Setting LD_PRELOAD at the worker level would set it during
+                # fetch-content, which can fail randomly when a tar/unzip subprocess
+                # of fetch-content starts while the library is being extracted by
+                # another.
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+    run-on-projects: ['integration']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-sccache
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+
+win64-plain/opt:
+    description: "Win64 Opt Plain"
+    index:
+        product: firefox
+        job-name: win64-plain-opt
+    treeherder:
+        platform: windows2012-64/opt
+        symbol: Bp
+        tier: 2
+    worker-type: b-win2012
+    worker:
+        max-run-time: 7200
+        env:
+            PERFHERDER_EXTRA_OPTIONS: plain
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
+    run:
+        actions: [build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        config:
+            - builds/releng_base_firefox.py
+            - builds/taskcluster_base_windows.py
+            - builds/taskcluster_base_win64.py
+        extra-config:
+            disable_package_metrics: true
+            stage_platform: win64
+        mozconfig-variant: plain-opt
+    run-on-projects: ['mozilla-central']
+    fetches:
+        toolchain:
+            - win64-clang-cl
+            - win64-rust
+            - win64-nasm
+            - win64-node
+            - win64-cbindgen
+            - win64-winchecksec
+    optimization:
+        skip-unless-expanded: null
+
+win32-shippable/opt:
+    description: "Win32 Opt Shippable"
+    use-pgo: true
+    index:
+        product: firefox
+        job-name: win32-opt
+        type: shippable
+    attributes:
+        shippable: true
+        enable-full-crashsymbols: true
+    stub-installer:
+        by-release-type:
+            nightly: true
+            beta: true
+            release.*: true
+            esr.*: false
+            default:
+                by-project:
+                    # browser/confvars.sh looks for nightly-try
+                    try: true
+                    default: false
+    shipping-phase: build
+    shipping-product: firefox
+    treeherder:
+        platform: windows2012-32-shippable/opt
+        symbol: Bpgo(B)
+        tier: 1
+    run-on-projects: ['release']
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 10800
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+              builds/releng_base_linux_64_builds.py
+            - taskcluster_nightly.py
+        extra-config:
+            stage_platform: win32
+            mozconfig_platform: win32
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+
+win64-shippable/opt:
+    description: "Win64 Shippable"
+    use-pgo: true
+    index:
+        product: firefox
+        job-name: win64-opt
+        type: shippable
+    attributes:
+        shippable: true
+        enable-full-crashsymbols: true
+    shipping-phase: build
+    shipping-product: firefox
+    treeherder:
+        platform: windows2012-64-shippable/opt
+        symbol: Bpgo(B)
+        tier: 1
+    run-on-projects: ['release']
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 10800
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - taskcluster_nightly.py
+        extra-config:
+            stage_platform: win64
+            mozconfig_platform: win64
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+
+win32-add-on-devel/opt:
+    description: "Windows32 add-on-devel"
+    index:
+        product: firefox
+        job-name: win32-add-on-devel
+    treeherder:
+        platform: windows2012-32-add-on-devel/opt
+        symbol: B
+        tier: 2
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 10800
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/releng.manifest"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+        extra-config:
+            stage_platform: win32-add-on-devel
+            mozconfig_platform: win32
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+        mozconfig-variant: add-on-devel
+    run-on-projects: ['mozilla-beta', 'mozilla-release']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-sccache
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+
+win64-add-on-devel/opt:
+    description: "Windows64 add-on-devel"
+    index:
+        product: firefox
+        job-name: win64-add-on-devel
+    treeherder:
+        platform: windows2012-64-add-on-devel/opt
+        symbol: B
+        tier: 2
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 10800
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+        extra-config:
+            stage_platform: win64-on-devel
+            mozconfig_platform: win64
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+        mozconfig-variant: add-on-devel
+    run-on-projects: ['mozilla-beta', 'mozilla-release']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-sccache
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+
+win64-noopt/debug:
+    description: "Win64 No-optimize Debug"
+    index:
+        product: firefox
+        job-name: win64-noopt-debug
+    treeherder:
+        platform: windows2012-64-noopt/debug
+        symbol: B
+        tier: 2
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - builds/taskcluster_sub_win64/noopt_debug.py
+        mozconfig-variant: noopt-debug
+        extra-config:
+            mozconfig_platform: win64
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+    run-on-projects: ['mozilla-central']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-sccache
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+
+win32-noopt/debug:
+    description: "Win32 No-optimize Debug"
+    index:
+        product: firefox
+        job-name: win32-noopt-debug
+    treeherder:
+        platform: windows2012-32-noopt/debug
+        symbol: B
+        tier: 2
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/releng.manifest"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - builds/taskcluster_sub_win32/noopt_debug.py
+        mozconfig-variant: noopt-debug
+        extra-config:
+            mozconfig_platform: win32
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+    run-on-projects: ['mozilla-central']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-sccache
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+
+win32-rusttests/opt:
+    description: "Win32 Rust Tests Opt"
+    index:
+        product: firefox
+        job-name: win32-rusttests-opt
+    treeherder:
+        platform: windows2012-32/opt
+        symbol: BR
+        tier: 1
+    worker-type: b-win2012
+    worker:
+        max-run-time: 5400
+        env:
+            PERFHERDER_EXTRA_OPTIONS: rusttests
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/releng.manifest"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/taskcluster_base_windows.py
+            - builds/taskcluster_base_win32.py
+        extra-config:
+            stage_platform: win32-rusttests
+            build_targets: ['pre-export', 'export', 'recurse_rusttests']
+            disable_package_metrics: true
+        mozconfig-variant: rusttests
+    run-on-projects: ['mozilla-central']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - win64-clang-cl
+            - win64-rust
+            - win64-cbindgen
+            - win64-sccache
+            - win64-nasm
+            - win64-node
+            - win64-winchecksec
+    optimization:
+        test-inclusive: [rusttests]
+
+win32-rusttests/debug:
+    description: "Win32 Rust Tests Debug"
+    index:
+        product: firefox
+        job-name: win32-rusttests-debug
+    treeherder:
+        platform: windows2012-32/debug
+        symbol: BR
+        tier: 1
+    worker-type: b-win2012
+    worker:
+        max-run-time: 5400
+        env:
+            PERFHERDER_EXTRA_OPTIONS: rusttests
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/releng.manifest"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/taskcluster_base_windows.py
+            - builds/taskcluster_base_win32.py
+        extra-config:
+            stage_platform: win32-rusttests
+            build_targets: ['pre-export', 'export', 'recurse_rusttests']
+            disable_package_metrics: true
+        mozconfig-variant: rusttests-debug
+    run-on-projects: ['mozilla-central']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - win64-clang-cl
+            - win64-rust
+            - win64-cbindgen
+            - win64-sccache
+            - win64-nasm
+            - win64-node
+            - win64-winchecksec
+    optimization:
+        test-inclusive: [rusttests]
+
+win64-rusttests/opt:
+    description: "Win64 Rust Tests Opt"
+    index:
+        product: firefox
+        job-name: win64-rusttests-opt
+    treeherder:
+        platform: windows2012-64/opt
+        symbol: BR
+        tier: 1
+    worker-type: b-win2012
+    worker:
+        max-run-time: 5400
+        env:
+            PERFHERDER_EXTRA_OPTIONS: rusttests
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/taskcluster_base_windows.py
+            - builds/taskcluster_base_win64.py
+            - builds/taskcluster_sub_win64/rusttests_opt.py
+        mozconfig-variant: rusttests
+    run-on-projects: ['mozilla-central']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - win64-clang-cl
+            - win64-rust
+            - win64-cbindgen
+            - win64-sccache
+            - win64-nasm
+            - win64-node
+            - win64-winchecksec
+    optimization:
+        test-inclusive: [rusttests]
+
+win64-rusttests/debug:
+    description: "Win64 Rust Tests Debug"
+    index:
+        product: firefox
+        job-name: win64-rusttests-debug
+    treeherder:
+        platform: windows2012-64/debug
+        symbol: BR
+        tier: 1
+    worker-type: b-win2012
+    worker:
+        max-run-time: 5400
+        env:
+            PERFHERDER_EXTRA_OPTIONS: rusttests
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/taskcluster_base_windows.py
+            - builds/taskcluster_base_win64.py
+            - builds/taskcluster_sub_win64/rusttests_opt.py
+        mozconfig-variant: rusttests-debug
+    run-on-projects: ['trunk']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - win64-clang-cl
+            - win64-rust
+            - win64-cbindgen
+            - win64-sccache
+            - win64-nasm
+            - win64-node
+            - win64-winchecksec
+    optimization:
+        test-inclusive: [rusttests]
+
+win64-ccov/opt:
+    description: "Win64 Opt Code Coverage"
+    index:
+        product: firefox
+        job-name: win64-ccov-opt
+    attributes:
+        enable-build-signing: true
+    treeherder:
+        platform: windows2012-64/ccov
+        symbol: B
+        tier: 2
+    worker-type: b-win2012
+    worker:
+        artifacts:
+            - name: public/code-coverage-grcov.zip
+              path: workspace\obj-build\code-coverage-grcov.zip
+              type: file
+        max-run-time: 9000
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
+            RUSTC_BOOTSTRAP: '1'
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/taskcluster_base_windows.py
+            - builds/taskcluster_base_win64.py
+            - builds/taskcluster_sub_win64/ccov_opt.py
+        mozconfig-variant: code-coverage
+    run-on-projects: ['mozilla-central']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - win64-clang-cl
+            - win64-rust
+            - win64-rust-size
+            - win64-cbindgen
+            - win64-grcov
+            - win64-sccache
+            - win64-nasm
+            - win64-node
+            - win64-winchecksec
+
+win64-asan/debug:
+    description: "Win64 Debug ASAN"
+    index:
+        product: firefox
+        job-name: win64-asan-debug
+    treeherder:
+        platform: windows2012-64/asan
+        symbol: Bd
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
+            PERFHERDER_EXTRA_OPTIONS: "debug asan"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - builds/taskcluster_sub_win64/asan_debug.py
+        extra-config:
+            mozconfig_platform: win64
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+        mozconfig-variant: debug-asan
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-sccache
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+            - win64-llvm-symbolizer
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+    optimization:
+        skip-unless-expanded: null
+
+win64-asan/opt:
+    description: "Win64 Opt ASAN"
+    index:
+        product: firefox
+        job-name: win64-asan-opt
+    treeherder:
+        platform: windows2012-64/asan
+        symbol: Bo
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
+            PERFHERDER_EXTRA_OPTIONS: "opt asan"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+        extra-config:
+            stage_platform: win64-asan
+            mozconfig_platform: win64
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+        mozconfig-variant: nightly-asan
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-sccache
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+            - win64-llvm-symbolizer
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+
+win64-asan-reporter-shippable/opt:
+    description: "Win64 Opt ASAN Reporter (Shippable)"
+    attributes:
+        shippable: true
+    shipping-product:
+        by-release-type:
+            nightly: firefox
+            default: null
+    index:
+        product: firefox
+        job-name: win64-asan-reporter-opt
+        type: shippable
+    treeherder:
+        platform: win64-asan-reporter/opt
+        symbol: BoR
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
+            PERFHERDER_EXTRA_OPTIONS: "asan-reporter"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - builds/taskcluster_sub_win64/asan_reporter_opt.py
+            - taskcluster_nightly.py
+        extra-config:
+            stage_platform: win64-asan-reporter
+            mozconfig_platform: win64
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+        mozconfig-variant: nightly-asan-reporter
+        mar-channel-id:
+            firefox-mozilla-central-asan
+        accepted-mar-channel-ids:
+            firefox-mozilla-central-asan
+    run-on-projects: ['mozilla-central']
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+            - win64-llvm-symbolizer
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+
+win64-asan-fuzzing/opt:
+    description: "Win64 Fuzzing Opt ASAN"
+    index:
+        product: firefox
+        job-name: win64-fuzzing-asan-opt
+    treeherder:
+        platform: windows2012-64/asan
+        symbol: Bof
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
+            PERFHERDER_EXTRA_OPTIONS: fuzzing-asan
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+        extra-config:
+            stage_platform: win64-fuzzing-asan
+            mozconfig_platform: win64
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+        mozconfig-variant: nightly-fuzzing-asan
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-sccache
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+            - win64-llvm-symbolizer
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+    optimization:
+        skip-unless-expanded: null
+
+win32-devedition/opt:
+    description: "Win32 Dev Edition (shippable)"
+    use-pgo: win32-shippable/opt
+    index:
+        product: devedition
+        job-name: win32-opt
+        type: shippable
+    attributes:
+        shippable: true
+        enable-full-crashsymbols: true
+    stub-installer:
+        by-release-type:
+            nightly: true
+            beta: true
+            release.*: true
+            default:
+                by-project:
+                    # browser/confvars.sh looks for nightly-try
+                    try: true
+                    default: false
+    shipping-phase: build
+    shipping-product: devedition
+    treeherder:
+        platform: windows2012-32-devedition/opt
+        symbol: B
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 10800
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        options: [append-env-variables-from-configs]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - taskcluster_nightly.py
+        extra-config:
+            stage_platform: win32-devedition
+            mozconfig_platform: win32
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+        mozconfig-variant: devedition
+    run-on-projects: ['mozilla-beta']
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+
+win64-devedition/opt:
+    description: "Win64 Dev Edition (shippable)"
+    use-pgo: win64-shippable/opt
+    index:
+        product: devedition
+        job-name: win64-opt
+        type: shippable
+    attributes:
+        shippable: true
+        enable-full-crashsymbols: true
+    shipping-phase: build
+    shipping-product: devedition
+    treeherder:
+        platform: windows2012-64-devedition/opt
+        symbol: B
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 10800
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - taskcluster_nightly.py
+        extra-config:
+            stage_platform: win64-devedition
+            mozconfig_platform: win64
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.8.4"
+        mozconfig-variant: devedition
+    run-on-projects: ['mozilla-beta']
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+
+win64-aarch64/debug:
+    description: "AArch64 Win64 Debug"
+    index:
+        product: firefox
+        job-name: win64-aarch64-debug
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: windows2012-aarch64/debug
+        symbol: B
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/aarch64.manifest"
+            PERFHERDER_EXTRA_OPTIONS: aarch64
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - builds/taskcluster_sub_win64/debug.py
+        extra-config:
+            mozconfig_platform: win64-aarch64
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.9.6"
+        mozconfig-variant: debug
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-sccache
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+    optimization:
+        skip-unless-expanded: null
+
+win64-aarch64/opt:
+    description: "AArch64 Win64 Opt"
+    index:
+        product: firefox
+        job-name: win64-aarch64-opt
+    attributes:
+        enable-build-signing: true
+        enable-full-crashsymbols: true
+        # We need to package tests in order for the win64-aarch64-eme artifact
+        # build to fetch them, even though no tests run against this task
+        # directly.
+        skip-verify-test-packaging: true
+    treeherder:
+        platform: windows2012-aarch64/opt
+        symbol: B
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/aarch64.manifest"
+            PERFHERDER_EXTRA_OPTIONS: aarch64
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+        extra-config:
+            stage_platform: win64-aarch64
+            mozconfig_platform: win64-aarch64
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.9.6"
+    run-on-projects: ['integration']
+    use-sccache: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-sccache
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+    optimization:
+        skip-unless-expanded: null
+
+win64-aarch64-eme/opt:
+    description: "AArch64 Win64 Opt w/ EME"
+    index:
+        product: firefox
+        job-name: win64-aarch64-eme-opt
+    treeherder:
+        platform: windows2012-aarch64/opt
+        symbol: Be
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/aarch64.manifest"
+            PERFHERDER_EXTRA_OPTIONS: aarch64-eme
+            MOZ_ARTIFACT_TASK: {task-reference: '<win64-aarch64-opt>'}
+            MOZ_ARTIFACT_TASK_WIN32_OPT: {task-reference: '<win32-opt>'}
+            USE_ARTIFACT: '1'
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+        extra-config:
+            stage_platform: win64-aarch64
+            mozconfig_platform: win64-aarch64
+    dependencies:
+        win32-opt: build-win32/opt
+        win64-aarch64-opt: build-win64-aarch64/opt
+    fetches:
+        toolchain:
+            - linux64-node
+            - linux64-wine
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+    optimization:
+        skip-unless-expanded: null
+
+win64-aarch64-shippable/opt:
+    description: "AArch64 Win64 Shippable"
+    index:
+        product: firefox
+        job-name: win64-aarch64-opt
+        type: shippable
+    attributes:
+        shippable: true
+        enable-full-crashsymbols: true
+        # Skip the test packaging check because we copy test packages from
+        # another build task rather than generating them in this task.
+        skip-verify-test-packaging: true
+    shipping-phase: build
+    shipping-product: firefox
+    treeherder:
+        platform: windows2012-aarch64-shippable/opt
+        symbol: B
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/aarch64.manifest"
+            PERFHERDER_EXTRA_OPTIONS: aarch64
+            MOZ_ARTIFACT_TASK: {task-reference: '<win64-aarch64-opt>'}
+            MOZ_ARTIFACT_TASK_WIN32_OPT: {task-reference: '<win32-opt>'}
+            USE_ARTIFACT: '1'
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - taskcluster_nightly.py
+        extra-config:
+            stage_platform: win64-aarch64
+            mozconfig_platform: win64-aarch64
+    dependencies:
+        win32-opt: build-win32-shippable/opt
+        win64-aarch64-opt: build-win64-aarch64-shippable-no-eme/opt
+    fetches:
+        # Abuse fetches to copy the generated-files, langpack, and test
+        # artifacts from the non-eme build directly to the artifacts directory
+        # of this build.
+        win64-aarch64-opt:
+            - artifact: target.test_packages.json
+              extract: false
+              dest: ../artifacts
+            - artifact: target.common.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.cppunittest.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.mochitest.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.reftest.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.talos.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.raptor.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.condprof.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.awsy.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.xpcshell.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.web-platform.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.updater-dep.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.generated-files.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.langpack.xpi
+              extract: false
+              dest: ../artifacts
+        toolchain:
+            - linux64-node
+            - linux64-wine
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+    optimization:
+        skip-unless-expanded: null
+
+win64-aarch64-shippable-no-eme/opt:
+    description: "AArch64 Win64 Shippable w/o EME"
+    use-pgo: win64-shippable/opt
+    index:
+        product: firefox
+        job-name: win64-aarch64-no-eme-opt
+        type: shippable
+    attributes:
+        enable-full-crashsymbols: true
+        # We need to package tests in order for the actual
+        # win64-aarch64-shippable/opt build to copy them from this task, even
+        # though no tests run against this task directly.
+        skip-verify-test-packaging: true
+    shipping-phase: build
+    shipping-product: firefox
+    treeherder:
+        platform: windows2012-aarch64/opt
+        symbol: Nn
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/aarch64.manifest"
+            PERFHERDER_EXTRA_OPTIONS: aarch64-no-eme
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - taskcluster_nightly.py
+        extra-config:
+            stage_platform: win64-aarch64
+            mozconfig_platform: win64-aarch64
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.9.6"
+    run-on-projects: ['all']
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+    optimization:
+        skip-unless-expanded: null
+
+win64-aarch64-devedition/opt:
+    description: "AArch64 Win64 Dev Edition (shippable)"
+    index:
+        product: devedition
+        job-name: win64-aarch64-opt
+        type: shippable
+    attributes:
+        shippable: true
+        enable-full-crashsymbols: true
+        # Skip the test packaging check because we copy test packages from
+        # another build task rather than generating them in this task.
+        skip-verify-test-packaging: true
+    shipping-phase: build
+    shipping-product: devedition
+    treeherder:
+        platform: windows2012-aarch64-devedition/opt
+        symbol: B
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/aarch64.manifest"
+            MOZ_ARTIFACT_TASK: {task-reference: '<win64-aarch64-opt>'}
+            MOZ_ARTIFACT_TASK_WIN32_OPT: {task-reference: '<win32-opt>'}
+            USE_ARTIFACT: '1'
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - taskcluster_nightly.py
+        extra-config:
+            stage_platform: win64-aarch64-devedition
+            mozconfig_platform: win64-aarch64
+        mozconfig-variant: devedition
+    run-on-projects: ['mozilla-beta']
+    dependencies:
+        win32-opt: build-win32-devedition/opt
+        win64-aarch64-opt: build-win64-aarch64-devedition-no-eme/opt
+    fetches:
+        # Abuse fetches to copy the generated-files, langpack, and test
+        # artifacts from the non-eme build directly to the artifacts directory
+        # of this build.
+        win64-aarch64-opt:
+            - artifact: target.test_packages.json
+              extract: false
+              dest: ../artifacts
+            - artifact: target.common.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.cppunittest.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.mochitest.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.reftest.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.talos.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.raptor.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.condprof.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.awsy.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.xpcshell.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.web-platform.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.updater-dep.tests.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.generated-files.tar.gz
+              extract: false
+              dest: ../artifacts
+            - artifact: target.langpack.xpi
+              extract: false
+              dest: ../artifacts
+        toolchain:
+            - linux64-node
+            - linux64-wine
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win
+
+win64-aarch64-devedition-no-eme/opt:
+    description: "AArch64 Win64 Dev Edition w/o EME"
+    use-pgo: win64-shippable/opt
+    index:
+        product: devedition
+        job-name: win64-aarch64-no-eme-opt
+        type: shippable
+    attributes:
+        enable-full-crashsymbols: true
+        # We need to package tests in order for the actual
+        # win64-aarch64-devedition/opt build to copy them from this task, even
+        # though no tests run against this task directly.
+        skip-verify-test-packaging: true
+    shipping-phase: build
+    shipping-product: devedition
+    treeherder:
+        platform: windows2012-aarch64-devedition/opt
+        symbol: Nn
+        tier: 1
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian10-amd64-build}
+        max-run-time: 7200
+        env:
+            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/aarch64.manifest"
+            PERFHERDER_EXTRA_OPTIONS: aarch64-no-eme
+            MOZ_AUTOMATION_PACKAGE_TESTS: "1"
+    run:
+        actions: [get-secrets, build]
+        options: [append-env-variables-from-configs]
+        script: mozharness/scripts/fx_desktop_build.py
+        secrets: true
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_64_builds.py
+            - taskcluster_nightly.py
+        extra-config:
+            stage_platform: win64-aarch64
+            mozconfig_platform: win64-aarch64
+            env:
+                LD_PRELOAD: "/builds/worker/fetches/liblowercase/liblowercase.so"
+                LOWERCASE_DIRS: "/builds/worker/checkouts/gecko/vs2017_15.9.6"
+        mozconfig-variant: devedition
+    run-on-projects: ['mozilla-beta']
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang-win-cross
+            - linux64-rust-cross
+            - linux64-rust-size
+            - linux64-nasm
+            - linux64-node
+            - linux64-cbindgen
+            - linux64-dump-syms
+            - linux64-wine
+            - linux64-liblowercase
+            - linux64-winchecksec
+        fetch:
+            - nsis-3.01-win
+            - upx-3.95-win