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Got this bug on both desktop and laptop.
(sh.itjust.works)
A place to discuss the news and latest developments on the open-source browser Firefox
What addons do you use? Can you see something strange in browser console (F12->Console)? Do you use Browser Agent Switcher? If you run ff without addons is it the same? https://support.mozilla.org/en-US/kb/troubleshoot-issues-related-to-add-ons
(Also there is this old guide "How to ask questions the smart way". If you consider these things, usually you can get answers more quickly on the internet.)
I use, Ublock origin, Return YouTube Dislike, SponsorBlock for YouTube, Wayback Machine and Mendeley Web Importer. When all add-ons are disabled it does the same thing even after restarting windows. The console has long list of warnings. I'm not sure how to post them. Most of them say "Feature Policy: Skipping unsupported feature name", "Cookie “something” does not have a proper “SameSite” attribute value", "Content-Security-Policy warnings 2" or "Empty string passed to getElementById().". I'll keep the guide in mind for the future.