Examine source code of PDF4me Extension

{
  "name": "PDF4me",
  "short_name": "PDF4me",
  "version": "2.0.3.0",
  "description": "Links",
  "permissions": [],
  "options_page": "options.html",
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "PDF4me",
    "default_icon": {
      "16": "images/icon16.png",
      "32": "images/icon32.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "manifest_version": 2,
  "web_accessible_resources": [
    "images/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3257b255-59dc-4262-9469-37ffabf3a3c7}"
    }
  }
}