Examine source code of Fav

{
  "name": "Fav",
  "version": "2.0.1",
  "description": "Fav Bookmark Manager",
  "manifest_version": 2,
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/16.png",
      "24": "icons/24.png",
      "32": "icons/32.png"
    },
    "default_title": "Fav",
    "default_popup": "entry/extension.html"
  },
  "permissions": [
    "tabs",
    "storage",
    "https://*.github.com/*"
  ]
}