Examine source code of Video pause

{
  "manifest_version": 2,
  "name": "Video pause",
  "version": "1.0.3",
  "permissions": [
    "tabs",
    "nativeMessaging"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_title": "pause",
    "default_icon": {
      "16": "assets/icon-16.png",
      "32": "assets/icon-32.png",
      "48": "assets/icon-48.png",
      "128": "assets/icon-128.png"
    }
  },
  "icons": {
    "16": "assets/icon-16.png",
    "32": "assets/icon-32.png",
    "48": "assets/icon-48.png",
    "128": "assets/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "video-pauser@addons.vhack.eu",
      "strict_min_version": "110.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}