Examine source code of Vim for Google Docs

{
  "manifest_version": 3,
  "name": "Vim for Google Docs™",
  "version": "1.17",
  "author": "Quantier, LLC",
  "description": "Vim for Google Docs: Supercharge Your Typing With Vim",
  "icons": {
    "16": "icons/16x16.png",
    "32": "icons/32x32.png",
    "48": "icons/48x48.png",
    "128": "icons/128x128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://docs.google.com/document/*"
      ],
      "js": [
        "dist/ExtPay.js",
        "dist/bundle.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "clipboardRead",
    "clipboardWrite",
    "management"
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "support@vimfordocs.com"
    }
  }
}