Examine source code of Video Speed Controller

{
  "manifest_version": 2,
  "name": "Video Speed Controller",
  "version": "22",
  "description": "Control playback speed of any HTML5 video. Works on YouTube, Vimeo, and all sites with video elements.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{d27cf02b-7e88-49f2-8e17-827b882abd24}",
      "strict_min_version": "124.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_icon": {
      "16": "assets/icons/icon16.png",
      "32": "assets/icons/icon32.png",
      "48": "assets/icons/icon48.png",
      "96": "assets/icons/icon96.png"
    },
    "default_title": "Video Speed Controller",
    "default_popup": "src/popup.html"
  },
  "icons": {
    "16": "assets/icons/icon16.png",
    "32": "assets/icons/icon32.png",
    "48": "assets/icons/icon48.png",
    "96": "assets/icons/icon96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "src/content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}