Examine source code of Azure Tab Icons

{
  "manifest_version": 3,
  "name": "Azure Tab Icons",
  "description": "Automatic browser tab icons for Azure",
  "version": "1.2.0",
  "author": "Tom Plant",
  "browser_specific_settings": {
    "gecko": {
      "id": "{225328c3-d410-4aec-b3d6-21a9b47ebdbd}"
    },
    "gecko_android": {}
  },
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "https://*.portal.azure.com/*",
        "https://*.portal.azure.us/*",
        "https://*.portal.azure.cn/*",
        "https://*.portal.azure.com.mcas.ms/*",
        "https://*.portal.azure.us.mcas-gov.us/*",
        "https://endpoint.microsoft.com/*",
        "https://endpoint.microsoft.us/*",
        "https://endpoint.microsoftonline.cn/*",
        "https://endpoint.microsoft.com.mcas.ms/*",
        "https://endpoint.microsoft.us.mcas-gov.us/*",
        "https://intune.microsoft.com/*",
        "https://intune.microsoft.us/*",
        "https://intune.microsoftonline.cn/*",
        "https://intune.microsoft.com.mcas.ms/*",
        "https://intune.microsoft.us.mcas-gov.us/*",
        "https://entra.microsoft.com/*",
        "https://entra.microsoft.us/*",
        "https://entra.microsoft.com.mcas.ms/*",
        "https://entra.microsoft.us.mcas-gov.us/*",
        "https://dev.azure.com/*",
        "https://dev.azure.com.mcas.ms/*"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "msportalfx-svg.css"
      ],
      "matches": [
        "https://*.portal.azure.com/*",
        "https://*.portal.azure.us/*",
        "https://*.portal.azure.cn/*",
        "https://*.portal.azure.com.mcas.ms/*",
        "https://*.portal.azure.us.mcas-gov.us/*",
        "https://endpoint.microsoft.com/*",
        "https://endpoint.microsoft.us/*",
        "https://endpoint.microsoftonline.cn/*",
        "https://endpoint.microsoft.com.mcas.ms/*",
        "https://endpoint.microsoft.us.mcas-gov.us/*",
        "https://intune.microsoft.com/*",
        "https://intune.microsoft.us/*",
        "https://intune.microsoftonline.cn/*",
        "https://intune.microsoft.com.mcas.ms/*",
        "https://intune.microsoft.us.mcas-gov.us/*",
        "https://entra.microsoft.com/*",
        "https://entra.microsoft.us/*",
        "https://entra.microsoft.com.mcas.ms/*",
        "https://entra.microsoft.us.mcas-gov.us/*",
        "https://dev.azure.com/*",
        "https://dev.azure.com.mcas.ms/*"
      ]
    }
  ]
}