Bug#886289: firefox-esr: crashes when going X -> tty -> X

[Torbjorn Wictorin]

Package: firefox-esr
Version: 52.5.2esr-1~deb9u1 
Severity: normal

Hello,

firefox (under stretch) crashes when one flips from X to tty and back to X. This 
used to happen sporadically until some months ago, now it happens every time.

thanks,
Torbjörn W