Examine source code of Tabi - Visualize Tabs

{
  "manifest_version" : 2 ,
  "name" : "Tabi",
  "version" : "1.0",
  "description" : "Visualize and navigate through tabs.",
  "homepage_url" : "https://github.com/argit2/tabi",
  "icons" : {
    "16" : "icons/icon_16.png",
    "32" : "icons/icon_32.png",
    "48" : "icons/icon_48.png",
    "64" : "icons/icon_64.png",
    "128" : "icons/icon_128.png"
  },
  "permissions" : [
    "tabs" ,
    "storage" ,
    "bookmarks" 
  ],
  "background" : {
    "page": "background.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tabi@example.com"
    }
  },
  "sidebar_action": {
    "default_title" : "Tabi",
    "default_panel": "index.html",
    "default_icon" : "icons/icon_128.png"
  }
}