1640200 - [macOS] Glitches in the Protection panel while scrolling a long list of cookies

Status: NEW

(Firefox :: Protections UI, defect, P3)

Description

[Ciprian Georgiu [:ciprian_georgiu], Release Desktop QA]

Affected versions

• latest Nightly 78.0a1
• Beta 77.0b9
• Release 76.0.1

Affected platforms

• macOS 10.15

Steps to reproduce

1. Launch Firefox.
2. Navigate to about:preferences#privacy.
3. Select the Custom option and from the Cookies section, click on the drop-down menu, then select "All third-party cookies (may cause website to break)".
4. Access a site that has lots of 3rd party cookies, e.g. https://www.prosport.ro/
5. From the URL click on the shield icon.
6. Click on the "Third-Party Cookies" from the protection panel.
7. Scroll slowly through cookies via the scrollbar.

Expected result

• No UI issues can be observed at the bottom of the panel.

Actual result

• UI glitches can be observed at the bottom of the panel.

Regression range

• This does not seem to be a regression, since I was able to reproduce this on older version as well, e.g. Firefox 70.0 (where the ETP panel was redesigned).

Additional notes

• I was not able to reproduce on other mac machines, this may be an issue that affects only macs with retina display.
• Configuration used: MacBook Intel Core i7 (2.8 GHz) "Nvidia GeForce GT 750M 2GB
  Intel Iris Pro 1536 MB"
• Please observe the screencast with the issue.

Comment 1

[Erica Wright [:ewright]]

I could not reproduce, on Nightly 79.0a1 (2020-06-08) nor Firefox 77.0.1

• MacbookPro Catalina 10.15.4
• 2.9 GHz 6-Core Intel Core i9
• Intel UHD Graphics 630 1536 MB