[__BrianDGLS__]

I'm on windows 7, the new version seems to keep spawning a process which grinds my machine to a halt.

I've had to open task manager twice now to kill it. Only downloaded it 10 minutes ago.

[acdha]

Try starting Firefox in safe mode in case that's some broken extension:

https://support.mozilla.org/en-US/kb/troubleshoot-firefox-is...

[__BrianDGLS__]

No extensions installed. Literally just downloaded firefox.

[yoasif_]

Sibling comment recommended opening a bug. I concur: https://bugzilla.mozilla.org/enter_bug.cgi?format=guided#h=b...

[TheRealPomax]

sounds like you should file a bug about that so they can be aware of that problem and look into it.