Examine source code of kore.com screen share

{
  "title": "Enable Screen Capturing for Kore",
  "name": "kore.com screen share",
  "id": "{3ef085b0-fe60-11df-8cff-0800200c9a66}",
  "version": "1.1resigned1",
  "manifest_version": 2,
  "description": "This firefox extension enables screen capturing for kore.com",
  "main": "index.js",
  "author": "Kore Admin<korewebstore@gmail.com>",
  "engines": {
    "firefox": ">=45.0"
  },
  "license": "MIT",
  "permissions": [
    "*://*.kore.com/*",
    "*://*.kore.net/*",
    "*://*.kore.ai/*",
    "webRequest",
    "activeTab",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{691d7a27-8905-46be-85e5-11f422161331}"
    }
  }
}