_{Duplicate of [/questions/976177] ''Firefox constantly freezes on my Mac, although I've installed the latest version and tried all suggested fixes - without success.'' (locking)]. aw} I'm using an iMac, system 10.9. My problem is that Firefox 25 launches correctly and displays Google (which I've chosen as my start page), but that whenever I go to to a web page, Firefox hangs/freezes. For instance I can go to the BBC site, but once there FF hangs/freezes. Then it won't respond to any clicking or commands, and I have to force-quit. Firefox has even done this in the Mozilla help pages ! I've tried several other "fixes", all to no avail. Besides, a fix or workaround should not be necessary -it isn't with other browsers. And I've trashed FF more than once, doing a clean reinstall (yes, I've been careful to also trash any associated file, using Appcleaner). The problem has been there in every version of FF I've tried in the last four years. Version 3.5 worked well but all the subsequent versions have caused this problem. Why ? As I said, other browsers work, and do so without needing any "fixes". So they work, and so does my computer. The problem is with Firefox, that obviously has a flaw somewhere. I'd love to know what it is.