«  Firefox 156 beta cycle 

Uplifts by Product
21 uplifts

  1. OOM | small (14.29%) Known top crash
  2. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (13.49%) Top crash 1472062
  3. OOM | large | NS_ABORT_OOM | nsTSubstring<T>::AllocFailed | AppendUTF16toUTF8 | NS_ConvertUTF16toUTF8::NS_ConvertUTF16toUTF8 | mozilla::dom::serviceWorkerScriptCache::(anonymous namespace)::CompareManager::WriteToCache (11.90%) Top crash 2037258
  4. mozilla::dom::quota::QuotaManager::Shutdown::<T>::operator() (4.76%)
  5. mozilla::dom::CanonicalBrowsingContext::SetCrossGroupOpenerId (3.97%)
  6. mozilla::dom::UntypedToJSVal (3.97%)
  7. js::gc::detail::ChunkPtrHasStoreBuffer (3.17%)
Uplifts and Backouts
Bug Component Summary
1993981 WebRTC: Audio/Video Make MediaTrackGraph a tail-dispatchable(-only) nsISerialEventTarget
2044550 UI Tests Intermittent org.mozilla.focus.activity.WebControlsTest#verifyExternalLinksTest | java.lang.AssertionError
2063227 General Date picker ignores the min attribute when the input also specifies max
2064703 Performance 7.53 - 5.91% speedometer3 Editor-TipTap/total + 3 more (Linux) regression on Sun August 16 2026
2064975 Networking: Cookies Remove or update metrics expiring at the end of Firefox 156 (2026-08-27: networking.cookie_c*
2066655 Toolchains Perma [tier 2] Windows MinGW ld.lld: error: undefined symbol: __declspec(dllimport) mozilla::RLBoxSoundTouch::clear() | clang: error: linker command failed with exit code 1 (use -v to see invocation)
2066924 General update integrity tests from 136.0b6 -> latest fail on release channel
2067197 CSS Parsing and Computation Perma | /html/rendering/non-replaced-elements/form-controls/resets.html - when Gecko 156 merges to Beta on 2026-08-27
2067205 Task Configuration Perma lint beta mobile/android/android-components/plugins/dependencies/src/main/java/moz.yaml | UNEXPECTED-FAIL: Vendoring mobile/android/android-components/plugins/dependencies/src/main/java/moz.yaml FAILED before it could be verified: Exception: Process
2067464 Audio/Video Unship remote encoders from beta
2065346 Other …
2051466 Other …
2027336 Other …
Uplifts and Backouts
Bug Component Summary
2065431 Sidebar Sidebar always hidden after browser restart
2066412 Machine Learning: Frontend Users are unable to open the Smart Bar URL suggestion submenus
2066505 Graphics: WebRender Rendering artifacts during image transition animations if HWA disabled
2067488 Networking: HTTP Disable Happy Eyeballs temporarily
2061499 Other …
2065646 Other …
2056051 Other …
2054622 Other …