Examine source code of Mitrum

{
  "manifest_version": 2,
  "name": "Mitrum",
  "description": "Extension that allows you to schedule video meeting on Mitrum.",
  "version": "0.0.2",
  "minimum_chrome_version": "34",
  "icons": {
    "16": "mitrum-logo-16x16.png",
    "48": "mitrum-logo-48x48.png",
    "128": "mitrum-logo-128x128.png"
  },
  "permissions": [
    "https://calendar.google.com/*"
  ],
  "externally_connectable": {
    "matches": [
      "*://mitrum.id/*"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://calendar.google.com/calendar/*",
        "https://outlook.live.com/owa/*"
      ],
      "js": [
        "jquery.js",
        "RandomUtil.js",
        "RoomnameGenerator.js",
        "meet-calendar.js"
      ],
      "css": [
        "/css/all.css"
      ],
      "all_frames": false,
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    "mitrum-logo-48x48.png",
    "mitrum-logo-white-48x48.png",
    "mitrum-logo-red.svg",
    "mitrum-logo-grey.svg"
  ],
  "browser_action": {
    "default_title": "Create Mitrum Meetings",
    "default_popup": "popup.html"
  }
}