Step to reproduce: 1. Open an e10s window 2. Open data:text/html,<body%20style="display:flex;width:100%;height:100%;margin:0"> 3. Slowly enlarge the window, or just press F11 enter fullscreen mode This issue shows on Windows, but I cannot reproduce it on Linux.
Sometimes it could be really annoying that, the horizontal and vertical scrollbars keep appearing alternately infinitely.
Summary: [e10s] Expanding windows cause unwanted scrollbar when using flexible box → [e10s] Expanding window cause unwanted scrollbar when using flexible box
Can you get the scrollbar to stick around, or does it just briefly flash & disappear? (I can't repro on Linux or Win 8.1, FWIW.)
It seems to be a bug related to APZ instead of e10s. I cannot reproduce this problem today when I open Nightly. Later I realize that it is probably related to APZ which was enabled for one day yesterday. This problem can be easily reproduced just in about:home, where the issue is far more annoying than the test page I put in comment 0.
tracking-e10s: ? → ---
FYI, to enable APZ, you need to switch on layers.async-pan-zoom.enabled in about:config, and restart Firefox.
Summary: [e10s] Expanding window cause unwanted scrollbar when using flexible box → Expanding window cause unwanted scrollbar when using flexible box with APZ
This appears to be the same issue as bug 1157579. I can repro on Linux with APZ enabled and the patch I have for that bug seems to fix it.
Status: NEW → RESOLVED
Last Resolved: 3 years ago
Resolution: --- → DUPLICATE
Duplicate of bug: 1157579
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