Examine source code of Universal File Viewer

{
  "manifest_version": 2,
  "name": "Universal File Viewer",
  "version": "3.0.1",
  "description": "Beautify and highlight various file formats in browser",
  "author": "Walid Ahdouf",
  "homepage_url": "https://github.com/w0l1d/universal-file-viewer",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "permissions": [
    "<all_urls>",
    "storage",
    "clipboardWrite",
    "webRequest",
    "webRequestBlocking"
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "lib/js-yaml.min.js",
        "js/core/detector.js",
        "js/core/formatter.js",
        "js/core/highlighter.js",
        "js/core/viewer.js",
        "js/formats/json.js",
        "js/formats/yaml.js",
        "js/formats/xml.js",
        "js/formats/csv.js",
        "js/formats/toml.js",
        "js/fetcher.js",
        "js/main.js"
      ],
      "css": [
        "css/viewer.css"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_action": {
    "default_title": "File Viewer Settings",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png"
    }
  },
  "content_security_policy": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self'",
  "web_accessible_resources": [
    "lib/*",
    "css/*",
    "js/*",
    "icons/*",
    "viewer.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9fcf0451-bb25-4b50-b7ae-e788f10cc82b}"
    }
  }
}