Examine source code of Sokker.org Support

{
  "name": "Sokker.org Support",
  "version": "1.3.3",
  "description": "Firefox add-on which will make your sokker.org play easier!",
  "permissions": [
    "storage",
    "alarms",
    "notifications"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{6f83ad7a-64d7-48f7-b56e-acfa63e343a4}"
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "options_ui": {
    "page": "options-page.html"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "content_scripts": [
    {
      "js": [
        "js/content.js"
      ],
      "matches": [
        "https://sokker.org/*"
      ]
    },
    {
      "js": [
        "js/ntdb.js"
      ],
      "matches": [
        "https://ntdb.bluezero.sk/*"
      ]
    }
  ],
  "action": {
    "default_popup": "popup-page.html",
    "default_icon": {
      "16": "images/logo-16.png",
      "32": "images/logo-32.png",
      "48": "images/logo-48.png",
      "128": "images/logo-128.png"
    }
  },
  "icons": {
    "16": "images/logo-16.png",
    "32": "images/logo-32.png",
    "48": "images/logo-48.png",
    "128": "images/logo-128.png"
  },
  "manifest_version": 3
}