Hi there Ash, are you able to open Facebook in another browser?

Yes, I can use Chrome and Edge. I cleared my cache and cookies and temp files already. This happened right after it updated and restarted.

Thank you for the reply. I have reported to the webcompatability team and they are looking into this. Here is the bug report if you want to follow https://github.com/webcompat/web-bugs/issues/217280

To help understand the issue, developers are interested if the affected systems run some sort of antivirus or security software — like Bitdefender — if anyone's willing to confirm their setup. Thanks!

New version is out this week: https://www.firefox.com/en-US/firefox/150.0.1/releasenotes/ — let us know if updating fixes that for you, thanks!