(In reply to Emilio Cobos Álvarez (:emilio) from comment #2) > Ugh, thanks for filing. You would thing these APIs that are implemented in all browsers since ages would have pretty good test coverage... The opposite is true: It wasn't common practise to add tests for Gecko patches and implementations until ~ 17-18 years ago (and WPTs are much newer).
Bug 1655398 Comment 6 Edit History
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(In reply to Emilio Cobos Álvarez (:emilio) from comment #2) > Ugh, thanks for filing. You would thing these APIs that are implemented in all browsers since ages would have pretty good test coverage... The opposite is true: It wasn't common practise to add tests for Gecko patches and implementations before ~ 2007 (and WPTs are much newer).