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.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Firefox 15.0.1 runs so slow on Mac OS 10.7.4, Why? I am only able to load one tab at a time, and usually end of using Safari which I like more and more. Any hel

  • 1 reply
  • 11 have this problem
  • 1 view
  • Last reply by user633449

ccarpine
ccarpine
more options

This has really gotten back since I update to 15.0.1. I can't even get some sites to load. I have added nothing else. I don't have spyware, or any other similar programs.

This has really gotten back since I update to 15.0.1. I can't even get some sites to load. I have added nothing else. I don't have spyware, or any other similar programs.

All Replies (1)

user633449
user633449
more options

The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions, Open websites, and some Preferences.

To Reset Firefox do the following:

  1. Go to Firefox > Help > Troubleshooting Information.
  2. Click the "Reset Firefox" button.
  3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
  4. Firefox will open with all factory defaults applied.


Further information can be found in the Refresh Firefox - reset add-ons and settings article.

Did this fix your problems? Please report back to us!