-{"bugs":[{"last_change_time":"2026-03-07T06:21:30Z","priority":"--","severity":"--","status":"ASSIGNED","creation_time":"2025-05-01T13:52:50Z","op_sys":"All","summary":"Browser UI hang in sqlite3PagerSharedLock during LoginManagerCrypto decryption (via sqlite usage during NSC_DecryptInit for SDR crypto)","id":1963814,"keywords":[],"component":"Password Manager"},{"severity":"S3","priority":"P3","last_change_time":"2025-07-01T19:28:26Z","summary":"OSXDisplay::EnableVsync hangs in CVDisplayLinkCreateWithActiveCGDisplays","component":"Widget: Cocoa","id":1602842,"keywords":["perf:responsiveness"],"op_sys":"Unspecified","status":"NEW","creation_time":"2019-12-10T17:22:25Z"},{"last_change_time":"2025-05-28T19:20:30Z","priority":"--","severity":"S3","creation_time":"2020-11-16T15:30:13Z","status":"NEW","op_sys":"Unspecified","component":"Panning and Zooming","summary":"SendReceiveMouseInputEvent often blocks the main thread of the parent process","keywords":["perf:responsiveness"],"id":1677509},{"status":"NEW","creation_time":"2021-01-26T19:14:50Z","op_sys":"Windows","id":1688951,"keywords":["perf:responsiveness"],"summary":"Lazy font loading can still hang the main thread on Windows","component":"Layout: Text and Fonts","last_change_time":"2026-02-28T12:23:08Z","priority":"--","severity":"S3"},{"component":"Performance: General","summary":"[Meta] investigate performance issues on Reddit.","keywords":["meta"],"id":1689392,"status":"NEW","creation_time":"2021-01-28T16:03:57Z","op_sys":"Unspecified","priority":"--","severity":"--","last_change_time":"2025-03-11T08:41:57Z"},{"severity":"S3","priority":"P2","last_change_time":"2025-11-26T06:43:39Z","id":1771179,"summary":"AudioContext power optimizations","component":"Web Audio","keywords":["perf:resource-use","reproducible"],"status":"NEW","creation_time":"2022-05-25T16:56:04Z","op_sys":"Unspecified"},{"last_change_time":"2025-03-10T23:42:15Z","severity":"S2","priority":"P2","creation_time":"2022-08-31T21:19:22Z","status":"NEW","op_sys":"Unspecified","summary":"Fenix hangs and memory usage jumps on theguardian.com when opening headlines in new tab","id":1788530,"component":"Performance","keywords":["perf:resource-use","perf:responsiveness","reproducible"]},{"creation_time":"2023-04-05T14:45:37Z","status":"NEW","op_sys":"Android","summary":"CSS filter() with invert() and hue-rotate() results in sluggish scrolling on Wikipedia","component":"Graphics: WebRender","id":1826576,"keywords":["webcompat:platform-bug"],"last_change_time":"2025-10-30T20:58:10Z","priority":"--","severity":"S3"},{"status":"NEW","creation_time":"2023-08-18T17:52:57Z","op_sys":"Unspecified","id":1849393,"summary":"Firefox regularly hangs for over half a second in SessionWriter.sys.mjs calling IOUtils.writeJSON serializing a massive JS object when saving tab state","component":"Session Restore","keywords":["perf","perf:responsiveness"],"last_change_time":"2026-02-12T15:30:44Z","priority":"P3","severity":"S3"},{"priority":"P2","severity":"S2","last_change_time":"2026-02-13T14:27:59Z","summary":"Frequent long janks on Android on loading certain pages","id":1903530,"component":"Storage: Quota Manager","keywords":[],"status":"NEW","creation_time":"2024-06-19T11:50:31Z","op_sys":"Unspecified"},{"op_sys":"Windows 10","creation_time":"2024-11-04T09:34:27Z","status":"NEW","summary":"vizzy.io - The browser is slowed down and eventually stops responding","keywords":["webcompat:needs-contact","webcompat:site-report"],"id":1928948,"component":"Site Reports","last_change_time":"2025-03-20T03:11:36Z","severity":"S2","priority":"P2"},{"op_sys":"Unspecified","creation_time":"2025-04-30T12:23:32Z","status":"NEW","id":1963578,"summary":"ChatGPT on clean Firefox install - \"This page is slowing down Firefox.\"","keywords":[],"component":"JavaScript Engine","last_change_time":"2026-02-25T19:39:41Z","severity":"S2","priority":"P1"},{"last_change_time":"2025-07-04T18:23:19Z","severity":"S3","priority":"P3","op_sys":"Android","creation_time":"2025-06-12T19:54:27Z","status":"NEW","id":1971873,"summary":"m.facebook.com live site loads 100-200ms slower in Fenix than Chrome","component":"Performance: Navigation","keywords":["perf:pageload"]},{"op_sys":"Android","status":"NEW","creation_time":"2025-09-16T14:51:59Z","id":1988762,"summary":"Slow scrolling performance on particular sites (mastodon)","component":"Graphics: WebRender","keywords":["stalled"],"last_change_time":"2026-01-23T20:06:23Z","severity":"S2","priority":"--"},{"component":"Performance Engineering","summary":"Fenix cold start applink navigation performance ~1500ms slower than warm, hot scenarios, p75","id":1995805,"keywords":[],"creation_time":"2025-10-22T15:48:12Z","status":"NEW","op_sys":"Unspecified","priority":"P3","severity":"S2","last_change_time":"2025-11-19T22:29:16Z"},{"severity":"S3","priority":"--","last_change_time":"2026-02-11T20:34:10Z","summary":"ContentParent::KillHard janks the main thread","id":1550754,"component":"Crash Reporting","keywords":["perf:responsiveness","perf:startup","reproducible"],"op_sys":"Unspecified","status":"REOPENED","creation_time":"2019-05-10T14:52:25Z"}]}
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