You do not need the web page open, when using app. The port updates in the background. It is not a flaw or bug. Unfortunately I do not refresh web page to show changes, but the changes have been made.
my appologies, its been a work in progress things have changed, and continue to change, so here is an outline
The app was made for 1 purpose, some of us believe that instead of using classified games or a range of ports, why not target the individual port being used for that specific game of cod. The port changes with each game played, and i didnt want traffic being prioritized, that was not that specific port.
for pc/ps4.
in game menu look at connection setting you will see the port being used for example you will see port 3074 for in my app put this in the port box, click start, now when this is running you leave it run untill you stop playing the game(shutdown) etc. But the manual button you can press it once while your in game it will add to hyperlane but then stop running so its like a run once only button.
once you have your port set you will not need to change this unless you start using a diffrent port. How you use the app its up to you, but its that simple you have to options, but its up2u when you want to stop using. If you want to target specific game port then use it all the time you game, if you feel you dont need it then that is fine also.