571.41 KB, video/webm
I have a problem with Firefox Beta 53. Sometimes panels appear in a wrong place. It happens unpredictably, however, I noticed one specific scenario when it happens 1. Put Downloads button before location bar 2. In maximized window, click on that button 3. Press Win+Left to change window size. Then you can even press Win+Up to restore window size Result: Only right 30px of the panel are visible (panel is appears in a wrong place). Expected: The whole panel should be visible.
Happens with all buttons with panels, for example Pocket. Doesn't happen in Firefox ESR 45.
(In reply to 684sigma from comment #1) > Happens with all buttons with panels, for example Pocket. Doesn't happen in > Firefox ESR 45. I can see the issue in Fx45.8.0esr, with Win+Right key * 2.
Created attachment 8849657 [details] bug 1349094 + bug 1349096 = UX regression, by reporter.webm (In reply to YF (Yang) from comment #2) > (In reply to 684sigma from comment #1) > > Happens with all buttons with panels, for example Pocket. Doesn't happen in > > Firefox ESR 45. > > I can see the issue in Fx45.8.0esr, with Win+Right key * 2. This is not what I did. However, the panel never went off-screen, and that's why this bug is UX regression. This bug is especially bad in conjunction with Bug 1349096, which is still unconfirmed, watch attached video.
Mozregression-gui generated this regression range: https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=5b38cc764e9012ec544cc3b150c35db706e34ced&tochange=d280a7a149bba92ecdb59b9de0a0336c336de889 -> 1109868 - XUL popups with an anchor element should hide when the anchor loses its visibility and/or frame https://bugzilla.mozilla.org/show_bug.cgi?id=1109868
Setting flags based on regressing bug from comment 4.
Too late to fix in 53. We might still be able to take a patch in 54.