Firefox Startup Performance – March 5, 2010

I spent the week on-site at Mozilla HQ in Mountain View, which was great.


6 Comments on “Firefox Startup Performance – March 5, 2010”

  1. asp says:

    Hey, what happens when the same test is done on an XO laptop compared to a kisk ass, brand new, smoking desktop PC?

  2. pd says:

    Thanks for the continued focus and hard work on this crucial aspect of Firefox.

  3. Nigel says:


    Just found a performance improvement – it appeared to add a couple of seconds improvement to the start up performance – you may be interested.

    I removed old installed versions of Java that were showing in the console area. I restarted Firefox and that was a lot quicker!

    In with Windows 7 (x64)

    C:\Program Files (x86)\Mozilla Firefox\extensions

    Remove old versions of


    where the CAFEEFAC-0016-0000 relates to version 6 of Java and the 18 in the example above relates to the current version – removing 16 and 17 improved performance.

    Another possible improvement would be to do what is/was done via the Firefox preloader – in that it loaded a number of dll’s at boot time – making Firefox’s start appear quicker – its what I believe Microsoft is doing behind the scenes with IE

    I hope that this helps?

  4. Jigar shah says:

    Getting extensions stats for Addon is good first step for those who claim Ff is “bloat”. Will help extension developer and user to see whats an impact of the same.

  5. […] code projects this week. However, we investigated the extension performance work I mentioned last week, and got a conversation going, with posts by Taras, Asa and myself. I’ve listed the various […]

  6. daniel says:

    i am very grateful to this programme

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