1136497 - Firefox floods session.log to the tune of several gigabytes per day

Status: RESOLVED INCOMPLETE

(Core :: Widget: Gtk, defect)

Description

[Dennis Jacobfeuerborn]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:35.0) Gecko/20100101 Firefox/35.0
Build ID: 20150122214805

Steps to reproduce:

Use Firefox.


Actual results:

.cache/gdm/session.log in my home directory get flooded with message like:
JavaScript strict warning: https://www.google.com/js/bg/Tf-qGjWUMoHZMXVBkTsgDeQliWpEx7wNIIiB--IlBD8.js line 1 > eval, line 1: ReferenceError: deprecated caller usage
JavaScript strict warning: https://plus.google.com/_/scs/apps-static/_/js/k=oz.sbw.en_US.0KFYharWP1M.O/m=sbw_base,sbw_card,sbw_s/am=5AEGAAAH/rt=j/d=1/t=zcms/rs=AGLTcCMlM8OXySQvUApZIhIt-HfwzNxbUQ, line 2: SyntaxError: in strict mode code, functions may be declared only at top level or immediately within another function
JavaScript strict warning: https://bugzilla.mozilla.org/data/assets/c98a90851d2ae5b989b74529d5fea389.js?1424755211, line 45: ReferenceError: reference to undefined property i.children

The session.log grows over 1G during the day. This is excessive.
I noticed this because I was wondering why the free space of my harddisk kept shrinking without any apparent reason.


Expected results:

Firefox shouldn't log so excessively that the log consumes a significant amount of disk space.

Comment 1

[Karl Tomlinson (:karlt)]

Could you have a debug build perhaps, or a pref set to dump these errors?

Comment 2

[Eric Sassaman]

This may be caused by setting javascript.options.strict to true in about:config and loading certain Google scripts (in my case, Google recaptcha but I've seen the same problem from what looks like Google+ widget scripts). I assume the same problem could come about by concatenating certain "use strict" scripts with those scripts, but in my case that global setting caused a flood of those errors in the console. Check to see if that setting is on.