This is a simple tutorial to testing web services before put them into an app.
Now let test how to put these links into an app:
- Download Firefox on your PC;
- Open the browser and right-click into the web page needed

3. Click on "Ispect Element";
4. Click on Responsive Design Mode
5. Click on the top left menu "Responsive" and select "Nokia 8110 4G"

6. Now you can test it on you PC as you are using it on your phone

Now you can put web services into an app.
Remember to editing metadata.json file with a different name, for example pasting the link of the web service/online game instead of EXAMPLE like here:
{"version": 1, "manifestURL": "app://EXAMPLE/manifest.webapp"}
And into the manifest.webapp file put or remove the paramether
"fullscreen": true,
if you want show the indicators on the top of you want a fullscreen visualizzation in 320x240 resolution.
WARNING!
Not all the services are usable. Remember, your PC is poverful respect a KaiOS device. High apps can cause the block or made stuck your phone. Afther you must only rebooting it.
GOOD WORK!