Mugurell

New "ConfinedTestDispatcher" variation

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(Continuing from https://github.com/Kotlin/kotlinx.coroutines/issues/3246#issuecomment-1123713267) `kotlin-coroutines` 1.6.0 [came with a new API and multiplatform support](https://blog.jetbrains.com/kotlin/2021/12/introducing-kotlinx-coroutines-1-6-0/#kotlinx-coroutines-test-update). Trying to decide between `UnconfinedTestDispatcher` and `StandardTestDispatcher` we saw the need for maybe a new variation that...

## Expected Behavior - `@Mergifyio backport` creates a new PR. - mergify doesn't automatically deletes it's backport branches ## Actual Behavior - `@Mergifyio backport` seems set on reusing the already...

[BottomSheetBehavior] Allow avoiding STATE_HALF_EXPANDED

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**Is your feature request related to a problem? Please describe.** By popular request - https://stackoverflow.com/questions/59487982/android-how-to-disable-state-half-expanded-state-of-a-bottom-sheet: - have `behavior_fitToContents = false` to try getting the view to have 2 possible states:...

For #26224 - New TCP CFR popup

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### Pull Request checklist - [x] **Tests**: This PR includes thorough tests or an explanation of why it does not - [x] **Screenshots in Jira**: This PR includes screenshots or...

Intermittent Unit Test failure - StartupTypeTelemetryTest.WHEN record is called THEN telemetry is recorded with the appropriate label

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### Test Run: Test failed in https://github.com/mozilla-mobile/fenix/pull/26378 - https://firefoxci.taskcluster-artifacts.net/OIThuwo1TRSMqXOucAYXqg/0/public/reports/test/testDebugUnitTest/index.html ### Stacktrace: > java.lang.AssertionError: expected: but was: at org.junit.Assert.fail(Assert.java:88) at org.junit.Assert.failNotEquals(Assert.java:834) at org.junit.Assert.assertEquals(Assert.java:118) at org.junit.Assert.assertEquals(Assert.java:144) at org.mozilla.fenix.perf.StartupTypeTelemetryTest.WHEN record is called THEN...

### Pull Request checklist - [x] **Tests**: This PR includes thorough tests or an explanation of why it does not - [x] **Screenshots**: This PR includes screenshots or GIFs of...

Intermittent Unit Test failure - StartupTypeTelemetryTest.GIVEN all possible path and state combinations WHEN record telemetry THEN the labels are incremented the appropriate number of times

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### Test Run: Test failed in https://github.com/mozilla-mobile/fenix/pull/26379 - https://firefoxci.taskcluster-artifacts.net/LQafwb_IT0OnOQnz8stOLw/0/public/reports/test/testDebugUnitTest/index.html ### Stacktrace: > java.lang.AssertionError: label: hot_unknown expected: but was: at org.junit.Assert.fail(Assert.java:88) at org.junit.Assert.failNotEquals(Assert.java:834) at org.junit.Assert.assertEquals(Assert.java:118) at org.mozilla.fenix.perf.StartupTypeTelemetryTest.GIVEN all possible path and...

Intermittent UI test failure - assertion failure - DownloadFileTypesTest.downloadMultipleFileTypesTest

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Seen in https://github.com/mozilla-mobile/fenix/pull/25473 - https://console.firebase.google.com/u/1/project/moz-fenix/testlab/histories/bh.66b7091e15d53d45/matrices/8856446557927701424/executions/bs.51405ca90cd5280/testcases/2/test-cases ``` java.lang.AssertionError at org.junit.Assert.fail(Assert.java:87) at org.junit.Assert.assertTrue(Assert.java:42) at org.junit.Assert.assertNotNull(Assert.java:713) at org.junit.Assert.assertNotNull(Assert.java:723) at org.mozilla.fenix.helpers.ext.WaitNotNullKt.waitNotNull(WaitNotNull.kt:20) at org.mozilla.fenix.ui.robots.NavigationToolbarRobotKt.openEditURLView(NavigationToolbarRobot.kt:258) at org.mozilla.fenix.ui.robots.NavigationToolbarRobot$Transition.enterURLAndEnterToBrowser(NavigationToolbarRobot.kt:98) at org.mozilla.fenix.ui.DownloadFileTypesTest.downloadMultipleFileTypesTest(DownloadFileTypesTest.kt:73) ``` This seems different than the existing...

Use baseline profiles to improve startup performance

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(Spoiler: other apps saw even 30% - 40% startup improvements) ### Baseline profiles During installation, ART performs Ahead-of-time (AOT) compilation of methods in the profile, resulting in those methods executing...

Just a small refactoring of a feature not yet launched or part of Nimbus. ### Pull Request checklist - [ ] **Tests**: This PR includes thorough tests or an explanation...