testing purposes newtab

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "name": "testing purposes newtab",
  "short_name": "testing purposes newtab",
  "icons": {
    "128": "icons/abc.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://yahoo.com/*",
        "*://*.yahoo.com/*",
        "*://google.com/*"
      ],
      "run_at": "document_end",
      "all_frames": true,
      "js": [
        "contentScript.js"
      ]
    }
  ],
  "description": "testing features",
  "version": "33.0.0.4",
  "manifest_version": 2,
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "128": "icons/abc.png"
    },
    "default_title": "test"
  },
  "permissions": [
    "topSites",
    "cookies",
    "*://yahoo.com/",
    "storage",
    "webRequest",
    "tabs"
  ],
  "chrome_url_overrides": {
    "newtab": "html/index.html"
  }
}