I’ve been developing for brave so it will work for chrome and it should work for firefox. for brave its easy you put the github files into a folder, put brave browser into development mode, and then manage your extensions by adding the folder, you press f12 to get the console and look at the variables in extension storage.

if you get it to load properly you should see 🔄 Starting fetch for template: dalek.zone/api/v1/videos?sort=-publishedAt&nsfw=b…

in devTools on brave