aci/extension/manifest.json

{
   "manifest_version": 2, 
   "name": "aci",
   "version": "0.0.1",
   "description": "auto checkin",
   "content_scripts":[
      {
         "matches":  ["*://checkin.york.ac.uk/selfregistration"],
         "js": ["src/content.js"]
      }
   ],
   "permissions": [
      "webRequest",
      "*://aci-api.ashhhleyyy.dev/*",
      "*://checkin.york.ac.uk/*"
   ],
   "background": {
      "scripts": ["src/background.js"],
      "type": "module"
   },
   "browser_action": {
      "default_popup": "src/popup.html"
   }
}