Firefox will no longer open and I can not get the profile manager to open either. What do I do?

I tried to open firefox this morning, and it would not open. I tried to uninstall and reinstall several times and even deleted all of my information. I looked it up on your site, and it said to open the profile manager. I followed the directions on how to open it, and it too will not open. I tried several times to open it as well. I need help. I only use firefox and have for years, and I have never had this problem. What do I do?

A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
*https://support.mozilla.org/kb/Server+not+found
*https://support.mozilla.org/kb/Firewalls
Try to boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps.

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