stuff

eventPage.js

+sites_url = "sites.json"
+sites = {}
+
+function getSitesAndMirrors() {
+    $.getJSON("http://host.brendanabolivier.com/files/56bf24564ab24.json")
+                                    .done(function(data) { sites = data })
+}
+
 function getCurrentTabUrl(callback) {
   // Query filter to be passed to chrome.tabs.query - see
   // https://developer.chrome.com/extensions/tabs#method-query
 
 function updateTab() {
     getCurrentTabUrl(function(url) {
-        if(url.match(/:\/\/(.+)\//)[1] == "www.ijavn.org") {
+        if(url.match(/:\/\/(.+)\//)[1] in sites) {
             chrome.browserAction.setIcon({path: 'icon-red.png'})
         }
         else {
     })
 }
 
+chrome.runtime.onStartup.addListener(getSitesAndMirrors)
 chrome.tabs.onActivated.addListener(updateTab)
 chrome.tabs.onUpdated.addListener(updateTab)

manifest.json

     },
     "permissions": [
         "tabs",
-        "https://ajax.googleapis.com/"
+        "https://ajax.googleapis.com/",
+        "http://host.brendanabolivier.com/"
     ],
 
     "background": {
-        "scripts": ["eventPage.js"],
+        "scripts": ["jquery.js", "eventPage.js"],
         "persistent": false
     }
 }