I couldn't understand for weeks why I couldn't blur the background on Meet video calls anymore.
Well, it turns out that it's because I use Firefox and I don't have a Google account.
If you log in AND switch to Google Chrome, then you get the privilege of blurring the background on your video.
It didn't use to be this way. First it stopped working on Firefox, and then it required logging in.
What a shameful dark pattern, and since most meetings that aren't on Zoom are on Meet, there is no way around it. Well done, Google.
There is a Bugzilla on it that suggests Google disabled it on Firefox due to performance issues that the Mozilla team is working on, though it seems a bit dubious to me that it's not just an effort to push people to Chrome, since they're doing aggressive browser detection too.
https://bugzilla.mozilla.org/show_bug.cgi?id=1703668