Firefox: This address is restricted

February 2, 2011

During some development works recently I ran into this message:
The address uses a network port which is normally used for purposes other than Web browsing. Firefox has canceled the request for your protection.

Thanks Firefox, glad for your concern, but I actually need to view content on that port. Luckily there is a simple solution, override the default settings.

  • Open a new Firefox tab or windows and type ‘about:config’ into the URL bar
  • Search for ‘’. If it does not exist simply create it by right clicking on the page and clicking New – String.
  • Set the value to the port or range of ports you wish to use. EG: 1024, 1-8000

Congrats! Go reload that page and you should see your content!

One thought on “Firefox: This address is restricted

  1. Farghana (May 10, 2011)

    This really helped. Thanks a lot Ben!