Examine source code of DGG Bigscreen Revived

{
  "manifest_version": 2,
  "name": "DGG Bigscreen Revived",
  "description": "Automatically inserts Destiny's YouTube livestream into the DGG Bigscreen.",
  "version": "1.3",
  "browser_specific_settings": {
    "gecko": {
      "id": "{ebb57a72-ffd9-4e2d-8b14-b1c02a197148}",
      "strict_min_version": "42.0"
    }
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  }
}