I have multiple problems with Firefox 58.0.2 x64 when using Avast. The only evidence I have is the crash reports, which show the faulting module is snxhk64.dll. Firefox is fully patched to version 58.0.2. Windows 10 1709 x64 fully patched.
It causes Firefox to fail to start, to spawn blank and broken tabs, and to crash outright in the middle of rendering a page, or just when I leave it running in the background.
I do not have the Firefox Avast add-ons installed, and I do not have mail shield installed. Just File Shield, Web Shield, and Behavior Shield.
I'm tracking this problem on Bugzilla:
https://bugzilla.mozilla.org/show_bug.cgi?id=1420963You have to read down a bit before I figure out Avast is the root cause.
Uninstalling Avast and reverting to Windows Defender clears up all the problems listed in that thread. I would really rather use Avast, but Firefox crashes or fails to start so often I will have to leave it uninstalled if I can't fix it.
I have two other machines, a laptop and a desktop, that are running Firefox with Avast and not having any problems. The problem seems to be specific to this one machine.
I created exclusions in File Shield for C:\Program Files\Mozilla Firefox\* and C:\Users\[user]\Appdata\Roaming\Mozilla\* (where addon code is stored) to see if it's the realtime scanning that's causing the problem. Didn't help.
Any help?