Hi, Ray has spend weeks trying to find the regression cause of this bug https://bugzilla.mozilla.org/show_bug.cgi?id=1267935
The box size of some XUL elements are rendered incorrectly as soon as bug 1267935 got uplifted to Aurora 48. Before: https://bugzilla.mozilla.org/attachment.cgi?id=8739374 After: https://bugzilla.mozilla.org/attachment.cgi?id=8745882 So far Ray has identify the regression commit to be the one that simply sets the version from 48a1 to 48a2 -- I suspect we are unfortunately hitting a XUL/layout behavior that is only enabled on Nightly, but it's not easy to identify what that would be. Is there a more effective way to know figure out what that it? What's the recommendation to move this forward -- should Ray fix the XUL layout so that it would work on Aurora 48 w/o finding the XUL behavior we have encountered? Thanks, Tim
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