It sounds frustrating—here are a few other things to try before switching:Refresh Firefox – This restores default settings without losing bookmarks or history. Go to Help > More Troubleshooting Information and click Refresh Firefox.Check Profile Fold...
It sounds like a recent Firefox update might be causing compatibility issues with Facebook. Here are a few steps that may help:Clear Cache and Cookies – Go to Settings > Privacy & Security > Cookies and Site Data and clear data for Facebook to reset ...