Yeah, I do know about that. (You're referring to the PPA repo thing, yeah?) But there are a couple of reasons why that isn't a workable solution specifically for me specifically.

• The major reason is that I only use Ubuntu on my work machine and my employer's compliance department won't really answer questions about whether it's allowed to add extra repositories or install things not from the official Ubuntu repositories on company-owned hardware. (And they're always really threatening and assholeish about breaking the rules they won't elaborate on, so my best option is kindof just to interpret the rules as strictly as I can and follow that. Or else flout the rules and dare them to fire me. Heh...) Raising questions like that is always a whole thing.
• "firefox" from the PPA repo and "firefox" from Snap have the same package name which makes things awkward dealing with Apt. (Unless you use "firefox-esr" from the PPA repo, which would otherwise be an acceptable workaround if that was the only issue.)

So I just use Chrome on my work machine. I dislike Chrome more than Firefox for many reasons, but I at least mitigate some of the issues with Chrome by specifically not doing anything personal on my work machine. I don't really care if Chrome invades my employer's privacy. Especially when my employer doesn't give me a choice in browsers. If anything comes of it, it's their own damned fault.