manifest.json

{
   "background_page": "background.html",
   "browser_action": {
      "default_icon": "icons/pause.png",
      "popup":"popup.html"
   },
   "content_scripts": [
    {
      "matches": ["*://*/*"],
      "css": ["overlay.css"],
      "js": ["jquery.js", "underscore.js"]
    }
   ],
   "description": "Here's a description.",
   "icons": {
      "128": "icons/icon128.png",
      "16": "icons/icon16.png",
      "48": "icons/icon48.png"
   },
   "name": "Wandering Mind",
   "options_page": "options.html",
   "permissions": [ "notifications", "tabs", "*://*/*" ],
   "version": "0.1",
   "homepage_url": "https://github.com/monsanto/Wandermind"
}