310393 2026-03-20 14:25:16 -0700 Reduce memory overhead of user scripts and user styles in extensions with many distinct match patterns 2026-03-30 21:21:00 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 310651 1 nham nham commit-queue webkit-bug-importer oldest_to_newest 2192173 0 nham 2026-03-20 14:25:16 -0700 Extensions can specify user scripts and user styles with many distinct match patterns, either directly via the extension manifest or due to user behavior (e.g. if the user decides to load extensions only selectively on certain origins and that origin list is very long). In the current implementation of web extensions, this can lead to memory explosion because each distinct match pattern carries its own copy of the same exact user script and user style strings (see how `WebExtensionContext::addInjectedContent` loops over each pattern and creates an `API::UserScript` object for each pattern). 2192174 1 nham 2026-03-20 14:25:49 -0700 rdar://169436824 2192180 2 nham 2026-03-20 14:46:03 -0700 https://github.com/WebKit/WebKit/pull/61039 2192835 3 ews-feeder 2026-03-23 11:44:01 -0700 Committed 309775@main (4ed5ff4bf1ee): <https://commits.webkit.org/309775@main> Reviewed commits have been landed. Closing PR #61039 and removing active labels. 2193225 4 commit-queue 2026-03-24 13:14:01 -0700 Re-opened since this is blocked by bug 310651 2194003 5 nham 2026-03-26 10:41:40 -0700 Pull request: https://github.com/WebKit/WebKit/pull/61422 2194203 6 ews-feeder 2026-03-26 22:29:31 -0700 Committed 310050@main (2bea83cfe53c): <https://commits.webkit.org/310050@main> Reviewed commits have been landed. Closing PR #61422 and removing active labels. 2195412 7 ews-feeder 2026-03-30 21:21:00 -0700 Committed 305413.598@safari-7624-branch (8c2beed1f79f): <https://commits.webkit.org/305413.598@safari-7624-branch> Reviewed commits have been landed. Closing PR #4846 and removing active labels.