Many Firefox users would have come across errors like “This address uses a network port which is normally used for purposes other than Web browsing. Firefox has cancelled the request for your protection.“
Here is the solution for the above issue.
- open firefox
- Type “about:config” in the address bar
- Right click anywhere on the screen & click new > string
- Enter preference name as: network.security.ports.banned.override
- Enter string value as: 87(can be any port number which you want to access)
That’s it. You are done.