Examine source code of WebZalozky

{
  "description": "Saves the current URL to webzalozky.cz - online bookmark manager",
  "manifest_version": 2,
  "name": "WebZalozky",
  "version": "1.3resigned1",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "Icons/page-16.png",
      "32": "Icons/page-32.png"
    }
  },
  "permissions": [
    "tabs",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{cfb9823f-4bbb-4731-aecf-ec4e03f21bcc}"
    }
  }
}