Examine source code of Process Page

{
  "manifest_version": 2,
  "name": "Process Page",
  "description": "Addon to emulate a Bookmarklet",
  "version": "0.2.3",
  "browser_action": {
    "browser_style": true,
    "default_title": "Process Page"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "process-page@chrysalis.fi"
    }
  }
}