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There exist related bugs in bugzilla, frex https://bugzilla.mozilla.org/show_bug.cgi?id=825578 https://bugzilla.mozilla.org/show_bug.cgi?id=825578 . The css in
by mattchew 12y ago
There exist related bugs in bugzilla, frex https://bugzilla.mozilla.org/show_bug.cgi?id=825578 https://bugzilla.mozilla.org/show_bug.cgi?id=825578 .
The css invert filter was very recently added to Firefox. Haven't played with this but sounds like it could make the job easier, so maybe FF will catch up here.