I installed Firefox less than a month ago. Two days ago it suddenly quit while browsing. This didn't seem like a problem, really - I thought I'd just restart it - but it REMAINS open. The icon shows in my dock (on Mac) and the menu bar appears when I click the icon. I can browse menu selections but cannot choose one. I CANNOT: - Quit Firefox - either from the menu or with Ctrl+Q - Open New Window - Open Help - Access "Troubleshooting Information" - Select "Restart with Add-Ons Disabled..." - Use Safe Mode Because I cannot use Safe Mode, and cannot Quit the program, I CANNOT: - Uninstall (it refuses to delete, because the program is "open," as it won't quit) - Reinstall (I cannot override the existing because the program is "open") - Remove it from my Dock - ...pretty much anything else. I've read many articles discussing Troubleshooting, Safe Mode, Clean Reinstalls, etc., but unfortunately I cannot do any of these because Firefox remains open but completely unresponsive. (PS - I tried to install the Troubleshooting Information below, but, again, because Firefox is unresponsive, I couldn't open it lol - there was "no available application" to read it. I cannot go through the manual steps because I cannot access the Troubleshooting Information on the Help menu and so cannot even begin step 1.) If anyone has any suggestions, I would GREATLY appreciate it! Thank you very much for your time and help!