Hi, My Mozilla Firefox Web developer tool keeps autonomously toggling on/off in any Firefox window/tab.. Its as-if I'm repeatedly hitting Ctrl-Shft-I (which brings up the web developer tool in the bottom 1/4 of the browser). I've checked all Setting, turned off all hardware acceleration as suggested for similar flickering problem (which wasn't on anyway). I use Norton 360 Security Software but have Norton Safe Web disabled. The only active Extensions are Firefox Multi-Container and Firefox Sideview. Its not doing it at the moment, but I'm not sure exactly what triggers it and expect it to happen again. Last time it happened I was browsing Amazon. Hitting Ctrl-Shift-I only makes is turn off until start scrolling again, etc. I don't think its virus related, because I use Norton 360, and Task manager "Performance Tab" show the computer is generally very mellow. Please help, as I love Firefox, but this problem can drive one crazy. Thanks Larry Zdanis