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