Examine source code of 2-Column Google Results

{
  "applications": {
    "gecko": {
      "id": "two_col_google_search@wildsky.cc",
      "strict_min_version": "42.0"
    }
  },
  "version": "2.7.1resigned1",
  "manifest_version": 2,
  "name": "2-Column Google Results",
  "description": "Adjust the Google results page for wide screens by showing the results in two columns.",
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "include_globs": [
        "http://*.google.*/search*",
        "https://*.google.*/search*",
        "https://encrypted.google.*/search*",
        "https://*.startpage.com/do/search"
      ],
      "css": [
        "two_col.css"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "page_action": {
    "default_icon": "icon-16.png",
    "browser_style": true
  },
  "permissions": [
    "tabs"
  ]
}