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Firefox won't open at all on MacOS Mojave V. 10.14.6

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It bounces in the Dock once, looks like it tries to open, and then quits. I've uninstalled it thoroughly including all the system files then re-installed, won't help. Restrated the Mac still no good. Please help.

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Odd. Perchance, are you using the Facebook plug in? I ran a quick Google search and found this post https://support.mozilla.org/en-US/questions/1240674. Hope this helps.

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I've come across thru this post before. After running searches I couldn't locate any fbplugin anywhere :/ I am clueless why this is happening...

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"Saving session...The patch directory path is not valid for this application (/Users/ariaretailgroupinc./Library/Caches/Mozilla/updates/Applications/Firefox/updates/0)"