Found in

• 102.20esr

Affected versions

• 105.0a1 (20220816190318)
• 104.0 (20220816115024)
• 102.2.0esr (layout.css.backdrop-filter.enabled:true)

Affected platforms

• Windows10x64
• macOS 11
• Ubuntu 21.04

Steps to reproduce

1. Open https://codepen.io/konstantindenerz/full/oNNaEVp with maximized browser window.
2. Observe the right top part of the page below the View in Editor and Sign Up buttons.

Expected result

• Smooth animation.

Actual result

• Slight animation skip when the blur is fading away.

Regression range

• I will search for one asap if there is one.

Additional notes

• The animation skip can be seen inside the center of the page if the browser height and width are smaller. I attached a screen recording showing both issues here. The issue is barely visible, please download the video for a better quality.

Hello! I searched for a regression range, and the issue seems not to be a regression. I can reproduce the issue on Windows10x64 starting with Firefox 70.0a1 (2019-08-14) when the backdrop-filter was implemented with bug 1178765 while having layout.css.backdrop-filter.enabled:true.

Can you still reproduce this?

(In reply to Mayank Bansal from comment #2)

Can you still reproduce this?

Hello! It seems that the test case is changed and I can no longer see the animation movement unfortunatelly.