maintainer-feedback requested: [Bug 233669] www/firefox: IPDL protocol error - then SIGSEGV (Address boundary error)

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Bug 233669: www/firefox: IPDL protocol error - then SIGSEGV (Address boundary
error)
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=233669



--- Description ---
Firefox firefox-63.0.3_3,1 (and 63.0.2 and 63.0.1) crashing often - even in
safe-mode (without plugins and extensions).

Last log lines before crash:
-----------
lis 30 18:37:54 IPDL protocol error: could not lookup id for PTexture
lis 30 18:37:54 IPDL protocol error: Error deserializing 'textureParent'
(PTexture) member of 'TimedTexture'
Process 68049, “firefox” terminated by signal SIGSEGV (Address boundary error)
-----------

FreeBSD 11.2-RELEASE-p4.
Firefox installed from binary package (pkg install).