Since installing the latest version of Firefox via the automatic updater, my iMac has started to hang. It starts with the application itself becoming non-responsive, then while I can still move my mouse, the dock won't appear, I can't click on anything and I can't bring up the window to force quit anything. At first I thought it was a problem with the iMac itself, but then I remembered that this only started since the new Firefox went on. I'm now using Safari and the problem hasn't re-surfaced. Just wondering if its me or if anyone else has had similar? Thanks, Mike.