Tools > Options > Advanced > Updates.
I have mine set to Automatically Update, with Warn if will disable any of my Add-Ons checked. I also uncheck the Update Search Engines, as there is also a nasty tendency for other malware to keep slipping other Search Engines in & taking over the HomePage / New Tab (both of which I prefer to keep as "about:blank") & when other bugs get in there, it can mean having to go in & reconfigure things manually.
Well, I'm a couple of days (or 3) into the new "reset" and not a single pop-up. Life is great!!!
