Examine source code of Video URL Extractor

{
  "manifest_version": 2,
  "name": "Video URL Extractor",
  "version": "1.1resigned1",
  "description": "Extract the video URL from the current page.",
  "icons": {
    "48": "icons/logo.svg",
    "96": "icons/logo.svg"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icons/logo.svg",
    "default_title": "Video URL Extractor",
    "default_popup": "popup/extract_video.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5253b73b-cb04-4bd0-b0b9-fdbef67c263b}"
    }
  }
}