Firefox 42 crashes in Slackware 14.1 with file dialog operations. Crash happens right after you select a file for upload and then click a dialog button.
The crash reporter has nothing useful in details section (is it a fucking segfault?). Running firefox from terminal shows no output either. Removing my
~/.mozilla directory did not help.
Install Firefox 40 until a proper solution is found and disable auto-updates. While some people might object that is bad and unsecure and etc, it actually lets me to get some work done instead of debugging these issues. Especially when any useful debugging info is missing (is it a fucking segfault?).