[Bug 916591] Re: The browser causes 20-40% CPU load when displaying an animated gif

[G.M.]

I have the same problem, but on an old dual-core desktop machine,
firefox takes up to 105% CPU (or more) and often freezes the whole
machine.

A typical example is when sufing the:
http://izismile.com/
web site and open a few tabs with some of its pages. There's always a moment where you open a page like:
http://izismile.com/2016/06/03/page,2,daily_gifdump_30_gifs.html
and the whole firefox / computer freezes.

Interestingly, just opening a single tab with the page:
http://izismile.com/2016/06/03/page,2,daily_gifdump_30_gifs.html
alone does not seem to cause any problem.

Also, using about:config and all its options to clean up memory
(GC/CC/Minimize) does not help...

So I assume there is a memory leak somewhere that reveals itself under
high usage.

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Title:
  The browser causes 20-40% CPU load when displaying an animated gif

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