>>> My Info: Win7_64, Nightly 49, 32bit, ID 20160526082509 STR_1: 1. Extract attached "testcase 1" into a folder with short full name, open the .htm file 2. Scroll the box with comments to the bottom 3. Hover mouse over the box w/ comments, then keep moving mouse pointer above the comments (up/down), then move mouse pointer away from comments 4. Repeat Step 4 several times AR: Comments twitch up and down sometimes. See Note ER: No twitching Note: Actually some comments contain a lot of text, therefore it's broken into several lines. I figured that twitching happens, because text in some comments at the top changes the way it's broken into several lines. So the height of those comments also changes, therefore twtching happens
I tried the htm files in both original directory and testcase director, but it seems I failed to reproduce this issue. I'm on macOS with Firefox 50 Release, FWIW.
>>> My Info: Win7_64, Nightly 53, 32bit, ID 20161229030206 (2016-12-29) Reproducible
See Also: → bug 1327864
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