The crash started apparently out-of-the-blue, hitting thousands of Argentinian users on a Debian-based distro called Huayra, and specifically on version 5 which was based on Debian 10.
https://bugzilla.mozilla.org/show_bug.cgi?id=1839139
Everybody seemed to crash while searching for images on Google. All versions of Firefox - even very old ones - were affected suggesting that the change didn't happen on our side, but on Google's. 2/6