Ruby On Rails Error Search

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Ruby On Rails Error Search",
  "description": "Finds Ruby On Rails server errors on page and searches for answers",
  "version": "1.1",
  "author": "Carl Schwope, Ben Calegari",
  "icons": {
    "128": "main_icon.png"
  },
  "permissions": [
    "tabs",
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "button_icon.png",
    "default_title": "Search errors on Stack Overflow",
    "default_popup": "results.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://localhost:3000/*"
      ],
      "js": [
        "main.js",
        "compile_result.js",
        "process_localHost.js",
        "query_stackOverflow.js"
      ]
    }
  ]
}