Examine source code of Highlight

{
  "background" : {
    "scripts" : [
      "background.js" 
    ]
  },
  "browser_action" : {
    "default_title" : "Highlight",
    "default_popup" : "popup.html"
  },
  "commands" : {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Alt+B",
        "mac": "MacCtrl+Alt+B"
      },
      "description" : "Creates a Highlight."
    }
  },
  "icons" : {
    "48" : "icon.png",
    "96" : "icon@2x.png"
  },
  "manifest_version" : 2 ,
  "name" : "Highlight",
  "description" : "An extension that saves your place in the page.",
  "permissions" : [
    "bookmarks" ,
    "*://*/*" 
  ],
  "version" : "0.0.7"
}