so i use a program where you need to press f7 and you cant change it, but i only have a 67% keyboard and the layout i have selected in my keyboard setting doesnt seem to have fn on any of my keys so pls help
de:kde distro:endeavouros keyboard: custom kbd67 lite


do i use the website or some program? the website isnt supported on firefox
The website: https://caniusevia.com/
Correct, Firefox is not supported. VIA requires WebHID, which is a web standard that Firefox does not support. You can install something like Ungoogled Chromium for this. I keep that browser installed just for tinkering with keyboards using VIA. For literally everything else, I use a Firefox fork.