https://bugzilla.mozilla.org/show_bug.cgi?id=1720485
1720485 - Intermittent layout/base/tests/test_after_paint_pref.html | got MozAfterPaint when we...
RESOLVED (dholbert) in Core - Layout. Last updated 2021-08-15.
https://hacks.mozilla.org/2009/06/mozafterpaint/
debugging painting with MozAfterPaint - Mozilla Hacks - the Web developer blog
This was originally posted by Robert O'Callahan in the Mozilla web-tech blog. It's an interesting feature in Firefox 3.5 and is worth repeating here as part of...
mozilla hacksthe webdebuggingpaintingdeveloper