-{"bugs":[{"status":"ASSIGNED","id":1852924,"component":"Networking: HTTP","creation_time":"2023-09-13T10:36:04Z","summary":"H3 upload Speed still slow. Three times slower than other browsers.","keywords":["leave-open","perf:responsiveness","reproducible","top50","webcompat:platform-bug"],"priority":"P1","op_sys":"Unspecified","severity":"S2","last_change_time":"2025-09-22T17:43:02Z"},{"op_sys":"All","severity":"--","last_change_time":"2025-07-03T16:42:57Z","keywords":[],"summary":"Browser UI hang in sqlite3PagerSharedLock during LoginManagerCrypto decryption (via sqlite usage during NSC_DecryptInit for SDR crypto)","creation_time":"2025-05-01T13:52:50Z","priority":"--","component":"Password Manager","status":"ASSIGNED","id":1963814},{"creation_time":"2019-12-10T17:22:25Z","summary":"OSXDisplay::EnableVsync hangs in CVDisplayLinkCreateWithActiveCGDisplays","keywords":["perf:responsiveness"],"priority":"P3","op_sys":"Unspecified","last_change_time":"2025-07-01T19:28:26Z","severity":"S3","status":"NEW","id":1602842,"component":"Widget: Cocoa"},{"component":"Panning and Zooming","status":"NEW","id":1677509,"op_sys":"Unspecified","severity":"S3","last_change_time":"2025-05-28T19:20:30Z","creation_time":"2020-11-16T15:30:13Z","keywords":["perf:responsiveness"],"summary":"SendReceiveMouseInputEvent often blocks the main thread of the parent process","priority":"--"},{"component":"Layout: Text and Fonts","id":1688951,"status":"NEW","last_change_time":"2025-08-22T20:22:21Z","severity":"S3","op_sys":"Windows","priority":"--","creation_time":"2021-01-26T19:14:50Z","summary":"Lazy font loading can still hang the main thread on Windows","keywords":["perf:responsiveness"]},{"component":"Performance: General","status":"NEW","id":1689392,"last_change_time":"2025-03-11T08:41:57Z","severity":"--","op_sys":"Unspecified","priority":"--","creation_time":"2021-01-28T16:03:57Z","keywords":["meta"],"summary":"[Meta] investigate performance issues on Reddit."},{"component":"Web Audio","id":1771179,"status":"NEW","last_change_time":"2025-11-26T06:43:39Z","severity":"S3","op_sys":"Unspecified","priority":"P2","creation_time":"2022-05-25T16:56:04Z","summary":"AudioContext power optimizations","keywords":["perf:resource-use","reproducible"]},{"summary":"Fenix hangs and memory usage jumps on theguardian.com when opening headlines in new tab","keywords":["perf:resource-use","perf:responsiveness","reproducible"],"creation_time":"2022-08-31T21:19:22Z","priority":"P2","op_sys":"Unspecified","severity":"S2","last_change_time":"2025-03-10T23:42:15Z","id":1788530,"status":"NEW","component":"Performance"},{"status":"NEW","id":1826576,"component":"Graphics: WebRender","creation_time":"2023-04-05T14:45:37Z","summary":"CSS filter() with invert() and hue-rotate() results in sluggish scrolling on Wikipedia","keywords":["webcompat:platform-bug"],"priority":"--","op_sys":"Android","severity":"S3","last_change_time":"2025-10-30T20:58:10Z"},{"op_sys":"Unspecified","severity":"S3","last_change_time":"2026-01-22T10:13:09Z","creation_time":"2023-08-18T17:52:57Z","keywords":["perf","perf:responsiveness"],"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","component":"Session Restore","status":"NEW","id":1849393},{"priority":"P2","keywords":[],"summary":"Frequent long janks on Android on loading certain pages","creation_time":"2024-06-19T11:50:31Z","severity":"S2","last_change_time":"2026-01-15T09:31:44Z","op_sys":"Unspecified","id":1903530,"status":"NEW","component":"Storage: Quota Manager"},{"priority":"P2","creation_time":"2024-11-04T09:34:27Z","keywords":["webcompat:needs-contact","webcompat:site-report"],"summary":"vizzy.io - The browser is slowed down and eventually stops responding","last_change_time":"2025-03-20T03:11:36Z","severity":"S2","op_sys":"Windows 10","status":"NEW","id":1928948,"component":"Site Reports"},{"id":1963578,"status":"NEW","component":"JavaScript Engine","summary":"ChatGPT on clean Firefox install - \"This page is slowing down Firefox.\"","keywords":[],"creation_time":"2025-04-30T12:23:32Z","priority":"P1","op_sys":"Unspecified","last_change_time":"2026-01-17T03:13:53Z","severity":"S2"},{"component":"Performance: Navigation","id":1971873,"status":"NEW","op_sys":"Android","last_change_time":"2025-07-04T18:23:19Z","severity":"S3","keywords":["perf:pageload"],"summary":"m.facebook.com live site loads 100-200ms slower in Fenix than Chrome","creation_time":"2025-06-12T19:54:27Z","priority":"P3"},{"status":"NEW","id":1988762,"component":"Graphics: WebRender","creation_time":"2025-09-16T14:51:59Z","summary":"Slow scrolling performance on particular sites (mastodon)","keywords":["stalled"],"priority":"--","op_sys":"Android","last_change_time":"2026-01-23T20:06:23Z","severity":"S2"},{"last_change_time":"2025-11-19T22:29:16Z","severity":"S2","op_sys":"Unspecified","priority":"P3","creation_time":"2025-10-22T15:48:12Z","keywords":[],"summary":"Fenix cold start applink navigation performance ~1500ms slower than warm, hot scenarios, p75","component":"Performance Engineering","id":1995805,"status":"NEW"},{"status":"REOPENED","id":1550754,"component":"Crash Reporting","priority":"--","creation_time":"2019-05-10T14:52:25Z","keywords":["perf:responsiveness","perf:startup","reproducible"],"summary":"ContentParent::KillHard janks the main thread","severity":"S3","last_change_time":"2025-07-01T14:09:09Z","op_sys":"Unspecified"}]}
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