Steps to reproduce:

Browsers used:

• Firefox Developer Edition, 113.0b3 (64-bit), Windows 11
• Firefox, 112.0 (64-bit), Windows 11
  Note: If this is indeed not just due to something in my setup it may be a new bug introduced since 112.0 and not specific to Dev Edition - I haven't tried downgrading or checking Nightly.

Go to https://www.w3schools.com/html/html5_video.asp.

Play the example video.

Hover into the controls area coming from the bottom of the video. Click on the progress bar (making sure to not move your mouse during/right after the click).

See videos (attaching zip broke bug submission, will attach one here and one in a comment)

Actual results:

As in FirefoxDevEdition.mp4: controls do not display when entering the video from the bottom - only when leaving the controls area and entering the main video area. When user clicks on the progress bar, it disappears.

Expected results:

As in FirefoxDefault.mp4: controls display on hover from the bottom and do not disappear when clicking the progress bar.

The bug submission issue I was having was because the zip was too big, and one video is too big. Uploaded them to streamable:

FirefoxDevEdition.mp4: https://streamable.com/73yv7a

FirefoxDefault.mp4: https://streamable.com/73yv7a

I can reproduce on Nightly 114.0a1 Windows10:

Regression window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=be6ab6cd894d8c24ff38dca59c1820ef8c51a831&tochange=4d6b19e4c8bdd48e2553678ca95add19f6a0eedf