Stop forcing Firefox restarts all the time mid-session

[NoLifeDGenerate]

Bad enough it updates itself without asking. Fine. STOP expecting me to restart it for no reason. It's working fine. It'll restart when the PC does. Until then, leave me the hell alone. You have no business breaking tabs and forcing a restart.

[KevinBrosnan]

This happens when either there are multiple users or profiles running Firefox at the same time on a computer or more commonly the Linux distro has updated Firefox while Firefox is running.

When this happens Firefox's options are; randomly crash because API call does not match, detect the API incompatibility and prompt the user to do a clean restart, or spend a monumental amount of engineering work to maintain API compatibility while running mixed Gecko versions.

If you are using Linux then using the Mozilla build in /opt, the Snap or Flatpack versions will avoid the distro updating Firefox out from underneath it.