What the %$%@ is up with firefox

I logged into my laptop this AM and discovered that during the night firefox had crashed.  I restarted it and now it wont display any sites.  Every tab that is supposed to auto start is blank, even though it remembers the site address it wont load content no matter how many times I reload the page.  Some sites, e.g. mail.google.com, I get a message:

Server not found     

Firefox can't find the server at mail.google.com.

but entering

host mail.google.com

at the command line I get

mail.google.com is an alias for googlemail.l.google.com.
googlemail.l.google.com has address 66.102.7.83
googlemail.l.google.com has address 66.102.7.19

Furthermore if I run chrome it all works as expected.  It seems firefox gets worse every release.

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