Examine source code of Smart Video Navigator

{
  "manifest_version": 2,
  "name": "Smart Video Navigator",
  "version": "1.0",
  "description": "Increment, decrement, or set video number in the URL.",
  "permissions": [
    "tabs"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/video_48.png"
    },
    "default_title": "Smart Video Navigator"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dc0818b4-8f2a-4a86-9352-2743a9516ba5}"
    }
  }
}