Examine source code of Webroida

{
  "name": "Webroida",
  "version": "2.0.1",
  "description": "Firefox extension for Webroida",
  "permissions": [
    "storage",
    "cookies",
    "tabs",
    "http://*/*",
    "https://*/*",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "browser_action": {
    "default_popup": "html/popup.html"
  },
  "icons": {
    "32": "favicon_32.png",
    "48": "favicon_48.png",
    "64": "favicon_64.png",
    "128": "favicon_128.png",
    "256": "favicon_256.png"
  },
  "options_ui": {
    "page": "html/options.html",
    "open_in_tab": false
  },
  "manifest_version": 2
}