Examine source code of Azure DevOps Theme

{
  "manifest_version": 2,
  "name": "Azure DevOps Theme",
  "version": "0.3.0",
  "description": "Provide theme to Azure DevOps",
  "content_scripts": [
    {
      "css": [
        "styles.css"
      ],
      "js": [
        "content.js"
      ],
      "matches": [
        "https://dev.azure.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{abb4c5cf-651a-4c63-8a15-39582fbba839}"
    }
  }
}