Examine source code of OwOify

{
  "manifest_version": 2,
  "name": "OwOify",
  "description": "OwOify Google",
  "version": "0.0.2",
  "icons": {
    "128": "icon_128.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab",
    "contentSettings"
  ],
  "content_scripts": [
    {
      "js": [
        "OwO.js"
      ],
      "matches": [
        "http://*.google.com/*",
        "https://*.google.com/*"
      ]
    }
  ]
}