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diff --git a/netwerk/metrics.yaml b/netwerk/metrics.yaml
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+# 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/.
+
+# Adding a new metric? We have docs for that!
+# https://firefox-source-docs.mozilla.org/toolkit/components/glean/user/new_definitions_file.html
+
+---
+$schema: moz://mozilla.org/schemas/glean/metrics/2-0-0
+$tags:
+  - 'Core :: Networking'
+
+networking:
+  speculative_connect_outcome:
+    type: labeled_counter
+    description: >
+      Counts the occurrence of each outcome of a speculative connection
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=909865
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=909865
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - necko@mozilla.com
+      - acreskey@mozilla.com
+    expires: never
+    labels:
+      - successful
+      - aborted_socket_limit
+      - aborted_socket_fail
+      - aborted_https_not_enabled
+    telemetry_mirror: NETWORKING_SPECULATIVE_CONNECT_OUTCOME
+
+  cookie_timestamp_fixed_count:
+    type: labeled_counter
+    description: >
+      Counts the number of times a cookie's invalid timestamp was fixed when
+      reading it from the DB.
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1828126
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1828126#c5
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - necko@mozilla.com
+      - vgosu@mozilla.com
+    labels:
+      - creationTime
+      - lastAccessed
+    expires: never
+
+  cookie_creation_fixup_diff:
+    type: custom_distribution
+    unit: second
+    description: >
+      If we fix up a cookie creation timestamp that is in the future this
+      metric records the number of seconds that timestamp was off from NOW.
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1828126
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1828126#c5
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - necko@mozilla.com
+      - vgosu@mozilla.com
+    expires: never
+    range_min: 0
+    range_max: 315360000000
+    bucket_count: 100
+    histogram_type: exponential
+
+  cookie_access_fixup_diff:
+    type: custom_distribution
+    unit: second
+    description: >
+      If we fix up a cookie lastAccessed timestamp that is in the future this
+      metric records the number of seconds that timestamp was off from NOW.
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1828126
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1828126#c5
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - necko@mozilla.com
+      - vgosu@mozilla.com
+    expires: never
+    range_min: 0
+    range_max: 315360000000
+    bucket_count: 100
+    histogram_type: exponential