I can't login to the work-paid-for version of Microsoft Copilot with Firefox, for some reason. I've had one or two others - I think they were internal CMU website tools. And even more niche: My kids took a ski lesson last year at Snowbird and the website with their report card rejected anything that didn't identify as Chrome. It _worked_ with mobile FF, but it popped up a "YOU SHOULD USE CHROME" banner and wouldn't let me past.
So, small stuff. Maybe Copilot isn't working because of ublock, though.
In my experience if something isn't working in firefox, it's more likely that it's firefox antitracking setting much more often than ublock. You might try turning that off first.
So, small stuff. Maybe Copilot isn't working because of ublock, though.