Note

• Follow up for Bug 1243385

Affected versions

• 65.0RC
• 66.0b5
• 67.0a1 (2019-02-07)

Affected platforms

• Windows 10x64
• Ubuntu 18.04x64
• macOS 10.11.6

Steps to reproduce

1. Launch Firefox.
2. Navigate to https://gaming.youtube.com/ and open a video.
3. Scroll up/down repeatedly.

Expected result

• The page is correctly displayed.

Actual result

• Repainting issues are visible in the video area.
• See the attached screencast - https://drive.google.com/open?id=1M0iEyOPZR-RnWupQqf1c26hacYGqn9uK .

Regression range

• First bad: 6ad92b48085b5ec5532f14e0b9e3c5eb15ad9fa8
• Last good: cfc312d8ef205bcb6a58b840459a4ccd922dcf88
• Pushlog: https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=6ad92b48085b5ec5532f14e0b9e3c5eb15ad9fa8&tochange=cfc312d8ef205bcb6a58b840459a4ccd922dcf88
• Potential regressor: Bug 1157746

Additional notes

• Note that this issue seems that it was partially fixed by a bug from this pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=117e0c0d1ebe2cf5bdffc3474744add2416fc511&tochange=3804441e575c9f46fcb03894de3c780eeae7197f
• This issue is intermittent.

(In reply to Mihai Boldan, QA [:mboldan] from comment #0)

• Note that this issue seems that it was partially fixed by a bug from this pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=117e0c0d1ebe2cf5bdffc3474744add2416fc511&tochange=3804441e575c9f46fcb03894de3c780eeae7197f

Based on previous investigations of this website (e.g. bug 1243385 comment 22) I'd say with high probability the bug in that pushlog that affected it is bug 1433019.

Kartikaya, could you please look into this?

I'm not sure much can be done here, but I can take a look.

I'm going to dupe this back to bug 1243385 and reopen that one, because it looks like the site is still doing the same thing it was doing back then.