This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Firefox is slowing down.

  • 8 tontu
  • 2 am na jafe-jafe bii
  • 2 views
  • i mujjee tontu mooy FredMcD

more options

Firefox is slowing down after a while of being opened. For example: When writing it takes longer for the letters to show up, watching videos on youtube/netflix are laggy. Every thing I do whether it's typing, loading a tab, clicking on something, the action take about 1 second until the browser responds and it's super slow..

Firefox is slowing down after a while of being opened. For example: When writing it takes longer for the letters to show up, watching videos on youtube/netflix are laggy. Every thing I do whether it's typing, loading a tab, clicking on something, the action take about 1 second until the browser responds and it's super slow..

All Replies (8)

more options
more options

Separate Issue; Your System Details shows;

Installed Plug-ins

Shockwave Flash 30.0 r0 Shockwave Flash 31.0 r0
Having more than one version of a program may cause issues. You must remove the older programs. Then get the current full installer.

Flash: Grab the uninstaller from here:

http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html Uninstall Flash Player | Windows

http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-mac-os.html Uninstall Flash Player | Mac

Then reinstall the latest version.

Note: Windows users should download the active_x for Internet Explorer. and the plugin for Plugin-based browsers (like Firefox).

Note: Windows 8 and Windows 10 have built-in flash players and Adobe will cause a conflict. Install the plugin only. Not the active_x.

Flash Player Version 31.0.0.108

https://get.adobe.com/flashplayer/ Direct link scans current system and browser Note: Other software is offered in the download. <Windows Only>

https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) Note: Other software is offered in the download. <Windows Only>


See if there are updates for your graphics drivers https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration

more options

Restarting the computer seems to be working until the problem occurs again..

I've tried what you said with flash. If the problem appears again I'll let you know.

Thanks for helping!

more options

Flash is a FredMcD said

Separate Issue;
more options

Hey. Problem is still here. And now happens on chrome as well. Safe mode does not help. Starting to think it's something to do with my computer. After a while of it being on, when I open the browser it's all laggy.. A restart is a temporary fix but then it happens again after some time..

more options

The thing is, That the rest of the computer runs ok. Programs, games etc..

more options

Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

  • Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
  • Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}

more options

You may have ad/mal-ware. Further information can be found in this article; https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware?cache=no

Run most or all of the listed malware scanners. Each works differently. If one program misses something, another may pick it up.