Examine source code of Friend Inviter

{
  "$schema": "https://www.schemastore.org/webextension",
  "manifest_version": 3,
  "name": "Friend Inviter",
  "version": "1",
  "author": "argonX",
  "permissions": [
    "cookies",
    "webRequest"
  ],
  "host_permissions": [
    "https://*.fetlife.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://fetlife.com/events/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "friend-inviter@argonX.fetlife.com"
    }
  }
}