Examine source code of camfire.team

{
  "manifest_version": 2,
  "name": "camfire.team",
  "short_name": "camfire",
  "description": "Easy world wide peer-to-peer communication.",
  "version": "25.6.1",
  "icons": {
    "128": "images/camfire.png"
  },
  "author": "EGOTEC AG",
  "browser_action": {
    "default_icon": "images/camfire.png",
    "default_popup": "plugin.html"
  },
  "background": {
    "scripts": [
      "js/init.js"
    ]
  },
  "permissions": [
    "notifications",
    "storage",
    "idle"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8507acea-f7d5-4a73-97cc-0aafe7948999}"
    }
  }
}