Examine source code of Reddit Video Extractor

{
  "manifest_version": 2,
  "name": "Reddit Video Extractor",
  "version": "1.0.2",
  "description": "Get the direct link to a video on reddit.",
  "icons": {
    "16": "img/icon16.png",
    "32": "img/icon32.png",
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "permissions": [
    "contextMenus",
    "activeTab",
    "*://reddit.com/*",
    "*://*.reddit.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.reddit.com/*"
      ]
    }
  ],
  "background": {
    "scripts": [
      "main.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{17f8de88-945a-4825-abd6-80d79ea70a0c}"
    }
  }
}