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Date:      Sat, 3 Jul 2021 10:03:36 +0200
From:      Gary Jennejohn <gljennjohn@gmail.com>
To:        Craig Leres <leres@freebsd.org>
Cc:        freebsd-hackers@freebsd.org
Subject:   Re: firefox is slow and uses a lot of memory
Message-ID:  <20210703080336.7a01c22d@ernst.home>
In-Reply-To: <202107022003.162K34kg050615@critter.freebsd.dk>
References:  <37fe2be4-a142-c49e-e1b0-0e9a8fd07a74@freebsd.org> <202107022003.162K34kg050615@critter.freebsd.dk>

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On Fri, 02 Jul 2021 20:03:04 +0000
"Poul-Henning Kamp" <phk@phk.freebsd.dk> wrote:

> --------
> Craig Leres writes:
> > Starting with firefox 89 or so, I've found it starts using a LOT of 
> > memory and actually makes the system sluggish and causes momentary X 
> > freezes. I have 32G of ram/swap, is it reasonable for firefox to use 15G?  
> 
> I noticed recently that firefox had started DNS's all bookmarks rather
> aggressively I found something under about:config which made it stop,
> (sorry cant remember which setting) but that made it at lot more workable
> for me.
> 

Another possibility would be to enter about:networking#dns.  A button
"Clear DNS Cache" will appear.  Click on that and check whether that
reduces the amount of memory being used by firefox.

-- 
Gary Jennejohn



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