Had some problems with Firefox being ridiculously slow yesterday, so I updated in the hope of speeding it up. Big mistake. Firstly, the 54 tabs I use for work were all replaced with Fast Dial screens. Assuming the add-on had gone rogue, I removed it, but am still having more problems. All my tabs have gone mad. For one thing, any time I open a new tab, enter an address into the address bar and press Enter, or select an address from the Autocomplete menu, it does nothing. Only if I click a link that opens in a new tab can I open a new tab and get it to navigate to an actual address, but then, I can't access my other tabs until I've closed the new one. Also, all the Close Tab buttons have vanished from my tabs. To fix this, I have already tried: a) Disabling hardware acceleration, which made no difference. b) Starting in Safe Mode, which worked, so I went through my add-ons, narrowing it down. The problem appeared to be caused by Tab Utilities, so I disabled it, which solved the address entering problem. However, the Close Tab buttons were still absent, so I made the mistake of trying to find another tab management add-on that would be compatible with this version of Firefox. Found out the hard way that Tab Mix Plus and Tab Utilities Lite aren't, because the previous problem returned, but even now I've disabled both those add-ons (I think: can't double-check without closing this tab and losing the message), I still can't navigate to addresses in new tabs or look at any tab other than the most recent one I have open. Any ideas what to do about this, please?