I even use it at work (using PortableApps.com).
But some sites (ok, only StackExchange sites) I visit I get multiple popups asking for my user name and password. Because I’m behind a firewall I have to enter my credentials, no big deal. But they don’t work! So I have to hit Cancel. Not just once, but, like, 4 times!
And it’s not the HTTP proxy, it’s asking for a “moz-proxy”.
When I saw the “ws” protocol I was pretty sure the issue was with web sockets.
I decided to look to see if I could turn this off.
Sure enough, I was able to disable web sockets! Hurray! And now I don’t get those popups! Problem solved!
(This bug seems to be related.)
(Maybe I can make this guy hate Firefox a little less.)