Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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 slowness after update

  • 3 replies
  • 2 have this problem
  • 3 views
  • Last reply by FredMcD

more options

Right after the most recent firefox updates, it becomes extremely slow. If one tab is refreshing, all other tabs freeze as well. This happens to my laptop, as well as desktop.

Right after the most recent firefox updates, it becomes extremely slow. If one tab is refreshing, all other tabs freeze as well. This happens to my laptop, as well as desktop.

All Replies (3)

more options

Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options)
key, and then starting Firefox. A small dialog should appear. Click Start In Safe Mode (not Refresh).

Is the problem still there?


Start your Computer in safe mode with networking. Then start Firefox. Try Safe websites. Is the problem still there?

Starting The Computer In Safe Mode;
Free Online Encyclopedia

more options

Thank you for your hint. I did what you suggested. The problem went away in safe mode. So, I disabled the extensions, I also unchecked the "acceleration of hardware" option. Then, I start firefox in normal mode, the problem comes back again. Something else wrong? Thank you

more options

It could be the work of one of your add-ons. Type about:addons<enter> in the address bar to open your Add-ons Manager. Hot key; <Control>(Mac=<Command>)<Shift> A)

In the Add-ons Manager, on the left, select Extensions. Disable a few add-ons, then Restart Firefox.

Some added toolbar and anti-virus add-ons are known to cause Firefox issues. Disable All of them.

If the problem continues, disable some more (restarting FF). Continue until the problem is gone. After, you know what group is causing the issue. Re-enable the last group ONE AT A TIME (restarting FF) until the problem returns.

Once you think you found the problem, disable that and re-enable all the others, then restart again. Let us know who the suspect is, detective.