Examine source code of OVERSQUAD

{
  "manifest_version": 2,
  "name": "OVERSQUAD",
  "description": "Oversquad Stream Notifier",
  "version": "0.9.17resigned1",
  "icons": {
    "16": "/assets/img/icon/16.png",
    "32": "/assets/img/icon/32.png",
    "48": "/assets/img/icon/48.png",
    "64": "/assets/img/icon/64.png",
    "128": "/assets/img/icon/128.png"
  },
  "background": {
    "scripts": [
      "/assets/js/lib/jquery-3.1.1.min.js",
      "/assets/js/background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "/assets/img/icon/16.png",
      "32": "/assets/img/icon/32.png",
      "48": "/assets/img/icon/48.png",
      "64": "/assets/img/icon/64.png",
      "128": "/assets/img/icon/128.png"
    },
    "default_title": "Oversquad",
    "default_popup": "/popup.html"
  },
  "web_accessible_resources": [
    "/assets/img/icon/128.png"
  ],
  "permissions": [
    "activeTab",
    "notifications",
    "storage",
    "*://*.oversquad.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1b247458-c305-444e-a8fe-adea427b16e7}"
    }
  }
}