On Tue, Mar 14, 2017 at 01:16:35AM +0700, Robert Elz wrote: > A Vague memory from the distant past suggests that the thing to try > is to move aside the .mozilla directory, and allow the new firefox > to start in a completely clean environment.
Yes, this is a generic "firefox shows strange symptoms" debuggin advice. Alternatively you can run: firefox -P and create a brand new profile for testing. If that works better, something in your old profile is broken. Also testin without any plugins/addons is always a good idea. Martin
