Bug#864884: Firefox-esr 52.2 fails to start

[Bryan K. Walton]

Package: firefox-esr
Version: 52.2.0esr-1~deb8u1

After upgrading my stable Debian install to firefox 52.2.0esr-1~deb8u1, firefox will no longer start up for me.  It repeatedly crashes.  I can't start it in safe-mode.  And even telling it to start with ProfileManager doesn't work.  The problem doesn't appear to be profile related.  When I start it from the command line, I get the following output before receiving the error popup:

$ firefox 

(firefox-esr:5793): GLib-GObject-CRITICAL **: g_object_ref: assertion 'object->ref_count > 0' failed
ExceptionHandler::GenerateDump cloned child 5815
ExceptionHandler::SendContinueSignalToChild sent continue signal to child
ExceptionHandler::WaitForContinueSignal waiting for continue signal...

The popup I receive every time is the firefox error box.  It reads: "We're Sorry. Firefox had a problem and crashed. We'll try to restore your tabs and windows when it restarts. To help us diagnose and fix the problem, you can send us a crash report. . ."

If I tell it to restart firefox, I get the same result, every time.

Downgrading to firefox 45.9.0esr-1~deb8u1 returns Firefox to a working install.  Re-upgrading to the latest version again produces the problem.