I have a problem with several different pages and while googling something. For example, when I open YouTube the page loads but I can't open any videos or anything else. I can click on them but nothing happens, but if I write the address of a video in address bar it opens normally and I can watch it. This happens on most of the pages I visit. Like Gmail or Facebook, I write my email address and password but nothing happens when I press login or Enter on keyboard. When I google something I can't open some page I want in another tab by pressing the scroll wheel or by holding Ctrl and clicking on it and also nothing opens when I press the right mouse button on it. I've tried updating Firefox, uninstalling it and then installing it again, and I can't update any plugins because when I click update, again, nothing happens... I've installed Chrome and everything works fine there but I don't like Chrome I want to use Mozilla.