After upgrading to the current 53.0.3 from Quarterly, Firefox fails to display many images embedded in web pages. Moving the .mozilla directory out of the way did not improve the situation: while the images on the welcome page seem to be correct, searching for images with Google still produces the result shown in the attached PNG. Starting from an xterm does not produce any messages obviously related to the problem.
Created attachment 183057 [details] Firefox startup log.
Created attachment 183058 [details] Screenshot showing the problem.
BTW: % uname -a FreeBSD pc8694 10.3-RELEASE-p18 FreeBSD 10.3-RELEASE-p18 #0: Tue Apr 11 10:13:20 UTC 2017 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC i386
Firefox has version 57.0.4. Overcome by events.
(In reply to w.schwarzenfeld from comment #4) This is probably true, and I do not have access to any hardware where I could reproduce the problem.