e0e0519b73
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