Bugzilla

STR:

1. open firefox/nightly on a clean profile
2. open about:config
3. create a new string pref `network.security.banned.ports`, give it value `45699` (or some other random value, let's refer to it as `myport`)
4. open a new tab, type in `localhost:myport` (so `localhost:45699` in our example) in the location bar and hit enter

ER:
An error with title "This address is restricted"

AR:
An error saying "Unable to connect" (assuming there's nothing running on the port you picked)

Ports that are blocked by default are blocked correctly. I don't know why the pref doesn't work.

STR:

1. open firefox/nightly on a clean profile
2. open about:config
3. create a new string pref `network.security.ports.banned`, give it value `45699` (or some other random value, let's refer to it as `myport`)
4. open a new tab, type in `localhost:myport` (so `localhost:45699` in our example) in the location bar and hit enter

ER:
An error with title "This address is restricted"

AR:
An error saying "Unable to connect" (assuming there's nothing running on the port you picked)

Ports that are blocked by default are blocked correctly. I don't know why the pref doesn't work.