How to allow a port restricted?

I'm trying to access a specific port and Firefox blocks access, https://x.x.x.x:xxxxx. This is the message:

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

How can I allow a specific port?

The address contains a number of unusual port after the colon, such as:

Example.com:9876

You can create a preference by typing about: config and leave the port number that is blocking Firefox. Here's how:

Select (0) and copy the following preference name

network.security.ports.banned.override

(1) in a new tab, type or paste Subject: config in the address bar and press enter/return. Click on the button promising to be careful.

(2) in the search above the list box, type or paste the ports and make a pause so that the list is filtered

If the preference listed above are:

(3) double-click it and add a comma at the end of the list, followed by the port number that you must allow. No spaces. And then click OK.

If there is no preference listed above:

(4) with the right mouse button anywhere on the page and choose new > String

(5) in the name preference dialog box, paste the name is facing you, and then click OK

(6) in the preference value dialog box, type the port number, you need to allow, and then click OK.

Please see the screenshot for example joint.

Tags: Firefox

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