Comment 9 for bug 1504914

Happens on every Linux OS I've tried
-Opensuse Leap
-Manjaro
Ubuntu 17.10 and 18.04 though 18.04 is a little better
-Fedora 27 and 28

How to trigger
-Open a whole bunch of tabs
-Reach high mem usage
-CPU load average will spike to really high numbers
-Excessive writes to hard drive
And system will freeze for a MINIMUM of 10 minute
-tests performed using Firefox
-This bug still exists in 2018.