Comment by altairprime

I think this is the most damning point: their terms extend to cover the text in URLs, and so by definition all text including titles and URLs — as well as any pages visited, due to tab syncing — would need to be in compliance with policy. If it’s as clearcut as presented here, anyways. Do the other browser profile syncing services have similar language? Is such overreach unique to Mozilla Corporation?

Though, considering how few people are likely to care about the legal exposure risk of continuing to use Firefox Sync, I don’t imagine this will end up being particularly enforceable in practice.