Bug 1388588

Summary:	Firefox writes a massive amount of data on disk
Product:	[Fedora] Fedora	Reporter:	Michal Stanke [:MikkCZ][:mstanke] (use needinfo) <michal>
Component:	firefox	Assignee:	Martin Stransky <stransky>
Status:	CLOSED UPSTREAM	QA Contact:	Desktop QE <desktop-qa-list>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	gecko-bugs-nobody, jhorak, mboisver, pjasicek, tpelka
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Hardware:	All
OS:	All
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Last Closed:	2016-11-21 09:28:37 UTC	Type:	Bug
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Description Michal Stanke [:MikkCZ][:mstanke] (use needinfo) 2016-10-25 17:41:46 UTC

Description of problem:
According to https://www.root.cz/clanky/firefox-pozira-vase-ssd-zapisuje-desitky-gb-denne/ and https://www.servethehome.com/firefox-is-eating-your-ssd-here-is-how-to-fix-it/ respectively, Firefox is writing a massive amount of data in the session and cookie store, which might scare SSD users. According to these sources, it can be up to 12 GB per day.

This was seen on Windows, but I was unable to reproduce on Linux, with 50 MB after 20 minutes of keeping Firefox idle (but 45 MB was written after the first 10 minutes). Can we verify, this is an issue on Linux and if there is any possible impact on the users and their experience or SSD health?

Version-Release number of selected component (if applicable):
Firefox release (49.0.2 at this moment)

Comment 1 Martin Stransky 2016-11-21 09:28:37 UTC

Moving upstream:

https://bugzilla.mozilla.org/show_bug.cgi?id=1304389
https://bugzilla.mozilla.org/show_bug.cgi?id=729165