Google Chrome killed Firefox. I uninstalled Chrome. How can I get Firefox back. Reinstalling doesn't do it.

I was using Firefox as my primary browser. After I installed Google Chrome, I could no longer open Firefox. It would appear to open, but immediately disappear. I reinstalled Firefox, but it did not solve the problem. I like Firefox; so I uninstalled Chrome. Now I cannot use either Chrome or Firefox. I simply get a blank window when I try to activate firefox. I have had to revert to IE in order to browse; however, I prefer Firefox. How do I resolve this problem?

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

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