firefox is trying to add updates but keeps saying it can't because there is another firefox running and needs to be shut down. i can't find another firefox.
same as the question
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Reboot the computer and try again.
i have tried it several times. i am also freezing up everything. have to shut down and restart. not sure what is going on. may have to take it to a shop.
Start your Computer in safe mode with networking. Then start Firefox. Try Safe websites. Is the problem still there?
Starting The Computer In Safe Mode;
Free Online Encyclopedia
Let’s do a full clean re-install; Download Firefox For All languages And Systems {web link} Save the file. Then Close Firefox.
Using your file browser, open the Programs Folder on your computer.
Windows: C:\Program Files
C:\Program Files (x86)
Mac: Open the "Applications" folder.
https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac
Linux: Check your user manual.
If you installed Firefox with the distro-based package manager,
you should use the same way to uninstall it - see Install Firefox on Linux.
If you downloaded and installed the binary package
from the Firefox download page, simply remove the folder
Firefox in your home directory.
Do Not remove the profiles folder.
Look for, and rename any Mozilla or Firefox program folders by adding .old to them. Do not rename the Mozilla Thunderbird folder if there is one.
After rebooting the computer, run a registry scanner. Then run the installer. If all goes well, remove the OLD folders when you are done.