Confirm
586
edits
Changes
→1. Over-invalidation
Debugging:
* Attach with the App Manager and tweak the structure and styles of the page to trigger the desired behavior. Positioning, z-index, and opacity styles are common culprits here.
* Use dump-painting: https://wiki.mozilla.org/Gecko:DisplayListBasedInvalidation#Debugging_Invalidations_Problems (Example Displaylist: https://bug979026.bugzilla.mozilla.org/attachment.cgi?id=8396816)
