Waterfox: Youtube is 99% dead in Classic

[psonnosp]

Describe the bug

In safe mode the mainpage looks like this

Just empty grey shapes and nothing can be clicked.

And the video pages look like this

The video plays and controls work but that's it, you can't scroll or click a thing outside the window.

To Reproduce

1. Go to https://www.youtube.com/ and https://www.youtube.com/watch?v=R8SZtNhL_W4
2. Voilá!

Expected behavior

That the pages load in full and work as in any other browser.

Screenshots

My configuration

• Device: PC
• OS: Windows 10
• Version: Classic 2020.10 x64

Additional context

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[Squall-Leonhart]

WFM.

[psonnosp]

WFM?

[tcreek]

May want to try a new profile. WFM (Works for Me).

[psonnosp]

It was the user agent switcher addon that was FUBAR and the setting was in place even when WF was restarted with all addons disabled but a reinstall fixed it.
Sorry for bothering you ;)