Closing as duplicate. Please see and continue with active thread [/questions/1048331] Problem looking likely to be malware. ----------- I have asked this question before. I thought it was tied to the website of my local newspaper since that seemed to be where it happened all the time. Tonight I was not on that site. I was in Tools>Add-ons, trying to switch from Plugins to Extensions when it locked up. Symptoms are the current tab will scroll up and down but no links work. No other tabs can be accessed. Tab cannot be closed. Tab shows "Connecting" with rotating busy icon. Firefox must be killed with the task manager. People have suggested deleting cookies and history - no effect unless I'm supposed to perform that action every few seconds in which case it's useless. Another suggestion was to deselect "Use hardware acceleration" in Tools>Options. Also no apparent effect. I thought it might be related to Flash because I was getting a lot of messages about a plugin container not working for that. I disabled Flash and got the "Video without flash" add-on (what a POS!) which doesn't appear to work at all. Any help would be appreciated. I'm getting tired of killing Firefox a dozen times (or more) per day and may have to investigate another browser (Ugh!).