I have the latest Firefox, and I just reinstalled it, but the following issue remains. Whenever I click on a button that would open a popup nothing happens. No popups would show at all. And this is very annoying as I'm not able to attach files in gmail or insert a picture in tumblr and so on. What the hell is causing this, and how to solve this? It's driving me nuts already. (No, I do not have the ''block popups'' option turned on in options.) Any help would be appreciated. BTW I have other issues as well and these may be related, I'm not sure: Firefox won't shut down properly, every time I have to kill it's process tree in Task Manager. It won't start properly, I always have to wait for a few minutes until it stands up. Some Flash objects that have sound won't close properly after closing their tab, e.g. the audio of a YouTube video keeps on playing and so on.