Don't use the built-in PDF viewer, it has always been VERY buggy, crashing FF 
more often than not 

On March 13, 2017 5:13:42 PM EDT, Jason Jackson <jasonjack...@sd44.ca> wrote:
>In our end user testing with ESR 52, we got feedback about PDFs locking
>up.  Sure enough, on every machine, every AcroForm is causing Firefox
>to stop responding.
>
>It doesn't actually crash, Firefox just becomes completely
>unresponsive, and you have to end task firefox.exe.  I tried deleting
>our autoconfig, I tried "Restart with Add-ons Disabled", and I tried
>Private Browsing mode, but none of this helped.  Reverting to ESR 45.7
>does resolve the problem.
>
>Then I noticed on a personal machine that there was no problem.  After
>some troubleshooting I've determined the cause is our security
>software: Sophos Endpoint Security and Control 10.6.  SESC isn't
>blocking or logging anything when this happens.  And it begs the
>question, why is ESR 45 okay with it but ESR 52 isn't?
>
>I'm at my wits' end.  Any help is appreciated.
>
>
>------------------------------------------
>Jason Jackson
>Computer Systems Technician
>North Vancouver School District

-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.
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