Switched my sister to Ubuntu because I got tired of re-installing the other OS every 6 months. Now she managed to get some malware in her Firefox on Ubuntu. Without access to the computer (or when I get it next week), where should I look, what questions can I ask, what could I tell a computer novice to try over the phone?
While surfing some recipe site she had an ad-window pop up with no window controls. She rebooted the computer and when she re-started Firefox it came back, full screen, no controls, on top.
I told her to just use -F2 and xkill to get rid of it, which it did but stopped Firefox completely. On re-start it was back, I told her to hit F11 which did take it back to a large screen, but not full-screen, so she could see that there was a normal browser window running underneath. She topped the normal window but the only other thing I had time to check was plug-ins, which there wasn't anything that sounded suspicious. I'm looking for ideas of what to try over the phone, or where to start next week.
I'm comfortable with the command line, and using about:config if that makes any difference in the answer.