Mastodon Handles in Twitter

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Mastodon Handles in Twitter",
  "description": "A helper to find people on Twitter that use Mastodon.",
  "version": "1.2.1",
  "manifest_version": 3,
  "permissions": [
    "https://*.twitter.com/*",
    "scripting"
  ],
  "host_permissions": [
    "https://*.twitter.com/*"
  ],
  "background": {
    "service_worker": "background.js"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.twitter.com/*"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "action": {
    "default_icon": "icon.png"
  }
}