This leak looks WebExtension-y with stuff like this in there:
> [task 2022-08-24T13:44:58.353Z] 13:44:58 INFO - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at mozilla::extensions::MatchPattern::Init, mozilla::extensions::MatchPattern::Constructor, mozilla::extensions::MatchPatternSet::Constructor, mozilla::dom::MatchPatternSet_Binding::_constructor
Bug 1738540 Comment 29 Edit History
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This leak looks WebExtension-y with stuff like this in there:
> TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at mozilla::extensions::MatchPattern::Init, mozilla::extensions::MatchPattern::Constructor, mozilla::extensions::MatchPatternSet::Constructor, mozilla::dom::MatchPatternSet_Binding::_constructor