I have a similar issue at my school as well. Chrome is the only allowed browser, and each of us have to use our own school email as our login session in chrome, so we get that much of user space, and that actually works quite decently. I had ublock installed on my user account so far, but if it breaks, I’ll just have to suffer. Although, the real problem is that the school I work in uses some digital books that only work 100% in Chrome, and all show some form of weird behaviour in non-chromiun based browsers. And there’s a 0 chance they are changing it.