manifest.json

{
   "content_scripts": [ {
      "js": [ "jquery-2.1.3.min.js", "inject.js" ],
       "run_at": "document_end",
      "matches": [ "http://sackinima.com/forums/*", "http://forums.sackinima.com/*" ]
   } ],
   "description": "BLAH BLAH BLAH",
    "browser_action": {
        "default_icon": "icon.ico",
        "default_popup": "popup.html"
    },
   "homepage_url": "http://jaren.co",
   "manifest_version": 2,
   "name": "Background Changer",
   "permissions": [ "http://*/*", "http://*/*", "storage" ],
   "version": "1.0"
}