Firefox 65 takes a long time to close & high CPU usage

Discussion in 'other software & services' started by Mrkvonic, Feb 2, 2019.

  1. Mrkvonic

    Mrkvonic Linux Systems Expert

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    This might be quite important and relevant. I've written a short tutorial showing how to troubleshoot, isolate and work around the issue of slowness in Firefox 65 on close, resulting in high CPU usage for extended period of time, including step-by-step component search, 32-bit vs 64-bit options, safe mode and EMET mitigations, the use of previous version and ESR build, accessibility services, and more.

    https://www.dedoimedo.com/computers/firefox-65-slow-close.html


    Cheers,
    Mrk
     
  2. xxJackxx

    xxJackxx Registered Member

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    I've seen a lot of complaints of issues with 65. I can't duplicate any of them. I don't doubt any of them, but they do not seem to affect everyone.
     
  3. JRViejo

    JRViejo Super Moderator

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    FYI. I'm not seeing the issue with my Firefox 65 64-bit browser either. Running only 3 add-ons: AdBlock Plus, HTTPS Everywhere and NoScript. Browser shuts down immediately, and all instances of firefox.exe are quickly released as well.
     
  4. elapsed

    elapsed Registered Member

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    I did my own testing and you can read it here for free without having to click a link with ads on the page:

    If you enable EAF protection in Exploit Guard, Firefox will slow down.
    This also applies to Firefox 64, and 63. Nothing unique to 65.
    Simple solution, don't enable EAF.
    Other mitigations work fine, including IAF.

    But you know, people gotta make money off nothing.
     
  5. Firecat

    Firecat Registered Member

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    To me, excluding the AV bug, Firefox 65 is one of the best and fastest releases of Firefox made to date on both Windows and Android. I've not seen these serious issues people are talking about.
     
  6. Surt

    Surt Registered Member

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    I've always waited on the XX.0.1 releases but went with this 65.0 to see what all the excitement was about. None at all. I agree with Firecat... "Firefox 65 is one of the best and fastest releases of Firefox made to date..."
     
  7. Minimalist

    Minimalist Registered Member

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    I didn't encounter any problems with slow shutdown after upgrading to 65. I did have similar problem with previous versions and solved it by disabling multiprocessing in FF.
     
  8. summerheat

    summerheat Registered Member

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    I've never had such problems with FF on Linux and on Windows. They might be related to 3rd-party AVs, indeed.
     
  9. imdb

    imdb Registered Member

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    same here.
     
    Last edited: Feb 3, 2019
  10. NiteRanger

    NiteRanger Registered Member

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    For me although I close the browser but Task Manager shows FF still running

    Unless I set to 'Never remember history' (i.e. in private browsing mode) then the problem goes away

    Using FF 65.0. No issue with 64.x
     
  11. vasa1

    vasa1 Registered Member

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    No problems with Fx65 on Linux. uBlock origin and Stylus are the only extensions.
     
  12. Mrkvonic

    Mrkvonic Linux Systems Expert

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    No problem on Linux indeed, but it's a different architecture, which is why I emphasized the Windows side of things.
    @summerheat, the slowness is not related to AV at all, because I don't use AV.
    Mrk
     
  13. Buddel

    Buddel Registered Member

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    FF 65.0 and Windows 10 64bit - no problems here.
     
  14. bellgamin

    bellgamin Very Frequent Poster

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    All FUD aside, FF 65 runs fast, smooth, & bug-free for me.
     
  15. fblais

    fblais Registered Member

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    I'm using the ESR on both Linux at home and Windows at work.
     
  16. Joxx

    Joxx Registered Member

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    Didn't know there was a FF 60 ESR. Just installed on Xubuntu 18.04 and there's a positive difference :)
     
  17. Victek

    Victek Registered Member

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    I'm not seeing any problem either with FFx64 on Windows 10; hopefully someone will figure it out.
     
  18. Daveski17

    Daveski17 Registered Member

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    Yes, Fx 65 is really good for me.

    fx65.png


    One day I might even figure out why I have a South African language pack. lol

    lan.png
     
  19. Mrkvonic

    Mrkvonic Linux Systems Expert

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    Just to emphasize, no issue on Linux :) this is entirely Windows-architecure related.
    And it's something that didn't happen in 64 and does in 65. Very specific.
    Mrk
     
  20. Special

    Special Registered Member

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    Count me as one of the people having issues with 65.0, thought it's not a speed issue like OP but a graphical one, had to go back to 64.0.2 where there are no issues, so it's clearly a regression with 65. Even made an effort post about it here so hopeful someone will have some ideas.
     
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