OS: Ubuntu 20.04 Affected Browser Versions: Latest Official Canonical packages, Mozilla Beta/Nightly apt releases, Manually downloaded tar.bz2 packages. (64bit versions 88/89) Installed Extensions: None, Clean profile Firefox has stopped responding to pretty much anything - opening a new tab on a clean install doesn't show the suggested links/pocket articles - only a blank page (right clicking on the page doesn't open any context menu). Attempting to navigate to any `about:` pages also results in a white page. Fresh profiles exhibit the same behavior. Occasionally, executing `firefox about:config` will open the config page - but attempting to navigate to another site or about page fails. However, attempting to execute `firefox www.google.com` does not load the requested webpage. The console also offers some warnings: pezhore@pezsudio  ~  firefox [Parent 43572, IPC I/O Parent] WARNING: FileDescriptorSet destroyed with unconsumed descriptors: file /build/firefox-UJSM5i/firefox-88.0.1+build1/ipc/chromium/src/chrome/common/file_descriptor_set_posix.cc:19 [Parent 43572, IPC I/O Parent] WARNING: FileDescriptorSet destroyed with unconsumed descriptors: file /build/firefox-UJSM5i/firefox-88.0.1+build1/ipc/chromium/src/chrome/common/file_descriptor_set_posix.cc:19 ... (this repeats like 50 times) [Parent 43572, IPC I/O Parent] WARNING: FileDescriptorSet destroyed with unconsumed descriptors: file /build/firefox-UJSM5i/firefox-88.0.1+build1/ipc/chromium/src/chrome/common/file_descriptor_set_posix.cc:19 [Parent 43572, IPC I/O Parent] WARNING: FileDescriptorSet destroyed with unconsumed descriptors: file /build/firefox-UJSM5i/firefox-88.0.1+build1/ipc/chromium/src/chrome/common/file_descriptor_set_posix.cc:19 [Parent 43572, Main Thread] ###!!! ABORT: file resource://gre/modules/addons/XPIProvider.jsm:2605 [Parent 43572, Main Thread] ###!!! ABORT: file resource://gre/modules/addons/XPIProvider.jsm:2605 ExceptionHandler::GenerateDump cloned child 48691 ExceptionHandler::SendContinueSignalToChild sent continue signal to child ExceptionHandler::WaitForContinueSignal waiting for continue signal...