Firefox: This address is restricted

Error Message:

This address is restricted
This address uses a network port which is normally used for purposes other than Web browsing. Firefox has canceled the request for your protection.


1. Open your Firefox.

2. Type about:config in your address bar and search for "".

3. If "" doesn't exist then right click anywhere in the windows and select New -> String and use "" as preference name and then hit the "OK" button.

4. Enter the port number to the value box.

For example,
If you need to visit and get this error message, then the blocking port is 1, so you add 1 to the box and click "OK" button. You can also select a range of ports by using "1-1024" as such a value or as a CSV style values such as "1024, 8080, 1-1000, 80"… etc

5. Once everything is done, you can try again to visit the same URL.

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