Examine source code of IMDB Search

{
  "manifest_version": 2,
  "name": "IMDB Search",
  "description": "Search IMDB, from any web page, for selected text. Go direct to the most likely entry. Optionally go to a section e.g. Episode List",
  "version": "0.0.0.16resigned1",
  "background": {
    "page": "background.html",
    "persistent": true
  },
  "browser_action": {
    "default_title": "Search IMDB",
    "default_icon": "icon_128x128.png"
  },
  "icons": {
    "128": "icon_128x128.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "contextMenus",
    "storage",
    "*://www.imdb.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c0f54710-d6fb-422e-a8ff-2896a88ac7ee}"
    }
  }
}