Firefox is blank, unresponsive, dead, etc. (Linux Mint)
Firefox has become unusable on my system. The software launches, but with a blank (grey) screen, and it cannot search or navigate. Menus are clickable (dropdowns work) but do not launch. For example, I cannot access Preferences, or about:config. I can click through Help and Troubleshooting Info, however.
I've tried a number of solutions, like Refreshing, reinstalling, and downgrading. The issue persists when I log in as another user on my system, and when I create new Firefox profiles. It persists as well in safe mode. I have also tried using Beta, Nightly, and ESR. Same issue everywhere. Also of note, Chromium works fine, and no other computer processes are affected.
At this point, my only remaining thought is the following: In reorganizing my personal files and folders on the system, I might have disrupted some important pathway. I'm a fairly new Linux user, so I worry my tinkering might have messed something up? Any ideas are helpful; I would really love to get back to using Firefox ASAP.