Differential Revision: https://phabricator.services.mozilla.com/D176637

Enables Prettier for (these don't need to be excluded):
- extensions/pref/autoconfig/test/unit/autoconfig.js
- services/sync/tests/unit/prefs_test_prefs_store.js

Removes duplications where the files are already ignored in the .eslintignore section.

Re-organises the structure of the remaining parts to make it clearer why they are being excluded.

Differential Revision: https://phabricator.services.mozilla.com/D176636

Bug 1830265 - Enable prettier formatting on testing/profiles/**/user.js files. r=ahal,perftest-reviewers,sparky

Differential Revision: https://phabricator.services.mozilla.com/D176635

Bug 1830265 - Enable Prettier and ESLint on toolkit/components/backgroundtasks/defaults. r=nalexander

Differential Revision: https://phabricator.services.mozilla.com/D176634

Bug 1828754 - Land strings for a CFR doorhanger to encourage users with FxA accounts but not syncing to begin syncing r=omc-reviewers,flod,mconley,aminomancer

Differential Revision: https://phabricator.services.mozilla.com/D176113

This patch has no observable changes, other than printing deprecation
messages when browser_style is effectively true in MV3.

This patch does include the full logic for all stages of the deprecation
process behind prefs, which will follow the schedule described at:
https://bugzilla.mozilla.org/show_bug.cgi?id=1827910#c1.

All combinations of these prefs are fully covered by unit tests in
toolkit/components/extensions/test/xpcshell/test_ext_browser_style_deprecation.js
The next test tasks confirm the behavior of the current patch:
- browser_style_never_deprecated_in_MV2
- supported_with_browser_style_false
- supported_with_browser_style_true
- supported_with_mv2_defaults

Differential Revision: https://phabricator.services.mozilla.com/D176811

Bug 1828154 - Ensure new cache entry exists after clearing old one in browser_locale_change.js. r=amy

This doesn't seem to absolutely fix the intermittent test failure here,
but does seem to reduce the frequency.

Differential Revision: https://phabricator.services.mozilla.com/D177158

Differential Revision: https://phabricator.services.mozilla.com/D177029

Bug 1818322 - Create MozTabList and MozTabRow reusable components r=mstriemer,fluent-reviewers,fxview-reviewers,sfoster,Jamie,flod

Differential Revision: https://phabricator.services.mozilla.com/D171879

Differential Revision: https://phabricator.services.mozilla.com/D176815

Bug 1830724: When we allow setParameters to change rids, ensure we set the new ones in SyncToJsep. r=dbaker

Differential Revision: https://phabricator.services.mozilla.com/D176846

Differential Revision: https://phabricator.services.mozilla.com/D176845

Differential Revision: https://phabricator.services.mozilla.com/D174775

Backed out changeset 08ee4eba4c40 (bug 1818322) for causing bc failures on browser_parsable_css.js CLOSED TREE

Differential Revision: https://phabricator.services.mozilla.com/D177163

See bug 1767679 for a similar bug+fix.

Differential Revision: https://phabricator.services.mozilla.com/D176287

Bug 1818322 - Create MozTabList and MozTabRow reusable components r=mstriemer,fluent-reviewers,fxview-reviewers,sfoster,Jamie,flod

Differential Revision: https://phabricator.services.mozilla.com/D171879

Bug 1831042: store the index of an added assertion and use it to update the corresponding assertion's status. r=jgraham

This allows nested assertions in `assert_dom_throws` which currently
some tests use, e.g. <popover-attribute-basic.html>.

Differential Revision: https://phabricator.services.mozilla.com/D177006

Differential Revision: https://phabricator.services.mozilla.com/D174237

Differential Revision: https://phabricator.services.mozilla.com/D171267

Backed out changeset 437a2458db3c (bug 1818322) for causing bc failures in moz-tab-list.mjs CLOSED TREE

Backed out changeset afc12be87873 (bug 1827910) for causing xpcshell failures in test_ext_browser_style_deprecation.js CLOSED TREE

Differential Revision: https://phabricator.services.mozilla.com/D177102

Bug 1830965: Fix test-verify failures for webtransport streams-echo wpt tests r=necko-reviewers,kershaw

Differential Revision: https://phabricator.services.mozilla.com/D177015

This patch has no observable changes, other than printing deprecation
messages when browser_style is effectively true in MV3.

This patch does include the full logic for all stages of the deprecation
process behind prefs, which will follow the schedule described at:
https://bugzilla.mozilla.org/show_bug.cgi?id=1827910#c1.

All combinations of these prefs are fully covered by unit tests in
toolkit/components/extensions/test/xpcshell/test_ext_browser_style_deprecation.js
The next test tasks confirm the behavior of the current patch:
- browser_style_never_deprecated_in_MV2
- supported_with_browser_style_false
- supported_with_browser_style_true
- supported_with_mv2_defaults

Differential Revision: https://phabricator.services.mozilla.com/D176811

Bug 1818322 - Create MozTabList and MozTabRow reusable components r=mstriemer,fluent-reviewers,fxview-reviewers,sfoster,Jamie,flod

Differential Revision: https://phabricator.services.mozilla.com/D171879

Differential Revision: https://phabricator.services.mozilla.com/D177148

Differential Revision: https://phabricator.services.mozilla.com/D176380

Differential Revision: https://phabricator.services.mozilla.com/D176994

Backed out changeset 424a49289df8 (bug 1831072)
Backed out changeset cc81053765a7 (bug 1831072)
Backed out changeset 7bec43b87e1d (bug 1831072)
Backed out changeset 8e0f85038c59 (bug 1831072)

Bug 1823888 - Clamp scale factor used in computing synthetic-bold offsets, to avoid bad print/pdf output. r=dholbert

Differential Revision: https://phabricator.services.mozilla.com/D174864

Differential Revision: https://phabricator.services.mozilla.com/D177064

Backed out changeset 3b7954a1bf92 (bug 1831079) for causing build bustages in FeatureManifest.sys.mjs.stub CLOSED TREE

Bug 1831079 - Add Nimbus feature manifest for Early Hints performance experiment prefs r=necko-reviewers,valentin

Differential Revision: https://phabricator.services.mozilla.com/D177024

Differential Revision: https://phabricator.services.mozilla.com/D177017

Bug 1828643 - Make sure LOAD_TRR_DISABLED_MODE gets passed through defaultLoadFlags when browsing context is replaced r=necko-reviewers,kershaw

When the user clicks continue this time in the DoH fallback warning page
we want to set the defaultLoadFlags to LOAD_TRR_DISABLED_MODE so all of
the pages & subresources in the tab will not use TRR from that point
forward.

Setting it directly on docshell.defaultLoadFlags seems to not have the correct
behaviour when the page is using the Cross-Origin-Opener-Policy header,
as that causes the DocumentChannel to do a cross process redirect and
recreate the browsing context.

Setting the defaultLoadFlags on the browsingContext directly and
adding the field to `CanonicalBrowsingContext::ReplacedBy` seems to lead to
the expected behaviour.

Differential Revision: https://phabricator.services.mozilla.com/D176959

This also simplifies some callers that only need to call the zone methods now.

Differential Revision: https://phabricator.services.mozilla.com/D177039

I didn't update ReleaseAllJITCode out of an abundance of caution, but maybe
this should call forceDiscardJitCode too.

Differential Revision: https://phabricator.services.mozilla.com/D177038

This doesn't seem to be necessary any more.

Depends on D177035

Differential Revision: https://phabricator.services.mozilla.com/D177036

Bug 1831072 - Part 1: Remove counts of realms where string or big int nursery allocation was disabled r=jandem

This data is sent to the profiler but is not used (the key names are not
present in the Firefox profiler repository).

Differential Revision: https://phabricator.services.mozilla.com/D177035