@Anonymous You can't do that on Firefox for Android, which is probably what @MC_Man_CZ is talking about when mentioning "mobile Firefox". The reference you give is only correct for versions of Firefox that give access to about:config, and Firefox for...
I strongly agree with this suggestion. I'm a subscriber to Firefox relay premium, that I use for a variety of online services where registration with an e-mail is required. If someone somehow got access to my Mozilla/Firefox account, that would be a ...
