I wrote a few as part of bug 1277583 but we should expand them, particularly to include some (probably synthetically added/removed in the test rather than relying on the extant flags for extant pages!) about: URIs.
I have patches up with added test coverage in bug 1335272.
Status: NEW → RESOLVED
Last Resolved: 2 years ago
Resolution: --- → DUPLICATE
Duplicate of bug: 1335272
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