Examine source code of FastRuTranslator

{
  "manifest_version": 2,
  "name": "FastTranslator",
  "version": "0.1",
  "description": "added fast translation option to context menu",
  "icons": {
    "48": "translate.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "menus",
    "storage",
    "activeTab",
    "contextMenus"
  ],
  "browser_action": {
    "default_popup": "https://translate.google.com",
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0ab20f7c-4f10-43e2-9280-9aed5b785ec2}"
    }
  }
}