Weirdness!
I'm using paid CBS subscription + Firefox + Cookie Editor + Anonymox add-ins. I've not paid for the Anonymox upgrade and get the Anonymox pop-up asking for money.
Tonight I started Firefox, got the "Firefox is downloading updates"; now the live feed is working fine with no lagging and no Anonymox pop-up.
Wild guess - Mozilla enforce their "open source software should be free" policy so stopped Anonymox charging?
What's happening for other users?