Examine source code of VKTex

{
  "name": "VKTex",
  "version": "1.4.0",
  "manifest_version": 2,
  "description": "Send math formulas with TeX on VK social network",
  "icons": {
    "16": "images/icon-16.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "permissions": [
    "https://vk.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://vk.com/*"
      ],
      "js": [
        "katex/katex.min.js",
        "katex/contrib/copy-tex.js",
        "main.js"
      ],
      "css": [
        "katex/katex.min.css",
        "katex/contrib/copy-tex.css",
        "autoscroll-fix.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f9fe7ece-4d98-42ad-9598-d09b8a56f76e}"
    }
  }
}