-{"bugs":[{"status":"ASSIGNED","severity":"S2","last_change_time":"2025-09-22T17:43:02Z","component":"Networking: HTTP","creation_time":"2023-09-13T10:36:04Z","op_sys":"Unspecified","summary":"H3 upload Speed still slow. Three times slower than other browsers.","id":1852924,"keywords":["leave-open","perf:responsiveness","reproducible","top50","webcompat:platform-bug"],"priority":"P1"},{"id":1963814,"summary":"Browser UI hang in sqlite3PagerSharedLock during LoginManagerCrypto decryption (via sqlite usage during NSC_DecryptInit for SDR crypto)","keywords":[],"priority":"--","status":"ASSIGNED","severity":"--","component":"Password Manager","last_change_time":"2025-07-03T16:42:57Z","creation_time":"2025-05-01T13:52:50Z","op_sys":"All"},{"severity":"S3","status":"NEW","last_change_time":"2025-07-01T19:28:26Z","component":"Widget: Cocoa","creation_time":"2019-12-10T17:22:25Z","op_sys":"Unspecified","id":1602842,"summary":"OSXDisplay::EnableVsync hangs in CVDisplayLinkCreateWithActiveCGDisplays","keywords":["perf:responsiveness"],"priority":"P3"},{"id":1677509,"summary":"SendReceiveMouseInputEvent often blocks the main thread of the parent process","keywords":["perf:responsiveness"],"priority":"--","severity":"S3","status":"NEW","component":"Panning and Zooming","last_change_time":"2025-05-28T19:20:30Z","creation_time":"2020-11-16T15:30:13Z","op_sys":"Unspecified"},{"summary":"Lazy font loading can still hang the main thread on Windows","id":1688951,"keywords":["perf:responsiveness"],"priority":"--","status":"NEW","severity":"S3","component":"Layout: Text and Fonts","last_change_time":"2025-08-22T20:22:21Z","creation_time":"2021-01-26T19:14:50Z","op_sys":"Windows"},{"id":1689392,"summary":"[Meta] investigate performance issues on Reddit.","priority":"--","keywords":["meta"],"component":"Performance: General","last_change_time":"2025-03-11T08:41:57Z","severity":"--","status":"NEW","op_sys":"Unspecified","creation_time":"2021-01-28T16:03:57Z"},{"creation_time":"2022-05-25T16:56:04Z","op_sys":"Unspecified","status":"NEW","severity":"S3","last_change_time":"2025-11-26T06:43:39Z","component":"Web Audio","keywords":["perf:resource-use","reproducible"],"priority":"P2","summary":"AudioContext power optimizations","id":1771179},{"keywords":["perf:resource-use","perf:responsiveness","reproducible"],"priority":"P2","id":1788530,"summary":"Fenix hangs and memory usage jumps on theguardian.com when opening headlines in new tab","creation_time":"2022-08-31T21:19:22Z","op_sys":"Unspecified","status":"NEW","severity":"S2","component":"Performance","last_change_time":"2025-03-10T23:42:15Z"},{"last_change_time":"2025-10-30T20:58:10Z","component":"Graphics: WebRender","status":"NEW","severity":"S3","op_sys":"Android","creation_time":"2023-04-05T14:45:37Z","id":1826576,"summary":"CSS filter() with invert() and hue-rotate() results in sluggish scrolling on Wikipedia","priority":"--","keywords":["webcompat:platform-bug"]},{"last_change_time":"2025-10-13T08:56:16Z","component":"Session Restore","status":"NEW","severity":"S3","op_sys":"Unspecified","creation_time":"2023-08-18T17:52:57Z","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","priority":"P3","keywords":["perf","perf:responsiveness"]},{"last_change_time":"2025-11-05T15:23:53Z","component":"Storage: Quota Manager","status":"NEW","severity":"S2","op_sys":"Unspecified","creation_time":"2024-06-19T11:50:31Z","summary":"Frequent long janks on Android on loading certain pages","id":1903530,"priority":"P2","keywords":[]},{"id":1928948,"summary":"vizzy.io - The browser is slowed down and eventually stops responding","keywords":["webcompat:needs-contact","webcompat:site-report"],"priority":"P2","severity":"S2","status":"NEW","component":"Site Reports","last_change_time":"2025-03-20T03:11:36Z","creation_time":"2024-11-04T09:34:27Z","op_sys":"Windows 10"},{"creation_time":"2025-04-30T12:23:32Z","op_sys":"Unspecified","severity":"S2","status":"NEW","last_change_time":"2026-01-06T22:59:01Z","component":"JavaScript Engine","keywords":[],"priority":"P1","summary":"ChatGPT on clean Firefox install - \"This page is slowing down Firefox.\"","id":1963578},{"severity":"S3","status":"NEW","component":"Performance: Navigation","last_change_time":"2025-07-04T18:23:19Z","creation_time":"2025-06-12T19:54:27Z","op_sys":"Android","summary":"m.facebook.com live site loads 100-200ms slower in Fenix than Chrome","id":1971873,"keywords":["perf:pageload"],"priority":"P3"},{"keywords":[],"priority":"--","summary":"Slow scrolling performance on particular sites (mastodon)","id":1988762,"creation_time":"2025-09-16T14:51:59Z","op_sys":"Android","status":"NEW","severity":"S2","component":"Graphics: WebRender","last_change_time":"2025-12-22T19:55:39Z"},{"creation_time":"2025-10-22T15:48:12Z","op_sys":"Unspecified","severity":"S2","status":"NEW","component":"Performance Engineering","last_change_time":"2025-11-19T22:29:16Z","keywords":[],"priority":"P3","summary":"Fenix cold start applink navigation performance ~1500ms slower than warm, hot scenarios, p75","id":1995805},{"creation_time":"2019-05-10T14:52:25Z","op_sys":"Unspecified","severity":"S3","status":"REOPENED","last_change_time":"2025-07-01T14:09:09Z","component":"Crash Reporting","keywords":["perf:responsiveness","perf:startup","reproducible"],"priority":"--","summary":"ContentParent::KillHard janks the main thread","id":1550754}]}
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