Examine source code of Web2Doc

{
  "options_ui": {
    "page": "options.html",
    "browser_style": true,
    "open_in_tab": false
  },
  "description": "Add URLs to Web2Doc - a read-later service",
  "icons": {
    "16": "16.png",
    "32": "32.png",
    "48": "48.png",
    "64": "64.png",
    "128": "128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "manifest_version": 2,
  "name": "Web2Doc",
  "version": "1.6",
  "permissions": [
    "activeTab",
    "storage",
    "scripting",
    "contextMenus",
    "https://*/*"
  ],
  "browser_action": {
    "default_icon": "128.png",
    "default_title": "Web2Doc",
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{666c42d2-15ce-4d72-8c5a-94baf0d9f815}"
    }
  }
}