Examine source code of Auto Pause Video

{
  "manifest_version": 2,
  "name": "Auto Pause Video",
  "version": "1.0",
  "description": "Pause videos when tab is inactive.",
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bbf57db0-fe0a-41e7-a968-a412936a52a1}"
    }
  }
}