Examine source code of Write Bar

{
  "manifest_version": 3,
  "name": "Write Bar",
  "version": "1.1",
  "description": "Track your word count in Google Docs with a progress bar.",
  "icons": {
    "48": "icons/icon.png",
    "96": "icons/icon96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://docs.google.com/document/d/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "permissions": [],
  "host_permissions": [
    "https://docs.google.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "writebar@syttpz.dev",
      "strict_min_version": "91.0"
    }
  }
}