Examine source code of OshiChat

{
  "manifest_version": 2,
  "name": "FremilyChat",
  "description": "Chat colours and Icons from on-screen chat for Fremily",
  "version": "4.1resigned1",
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "icons": {
    "16": "img/live16.png",
    "48": "img/live48.png",
    "128": "img/live128.png"
  },
  "browser_action": {
    "default_icon": "img/icon.png",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "js/CheckStatus.js",
      "jquery.js",
      "js/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.twitch.tv/fremily*"
      ],
      "js": [
        "jquery.js",
        "js/script.js"
      ],
      "css": [
        "rainbow.css"
      ]
    }
  ],
  "permissions": [
    "https://www.twitch.tv/",
    "https://ajax.googleapis.com/",
    "storage",
    "https://chat.oshi7.tv/",
    "notifications"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2451a606-9512-4352-afb0-68f2e2e47a9d}"
    }
  }
}