Examine source code of TwitterBird

{
  "name": "TwitterBird",
  "short_name": "TwitterBird",
  "description": "This extension restores the original twitter logo (The blue bird) on X",
  "manifest_version": 3,
  "version": "1.3.0",
  "author": "Arnaud Lemercier Wixiweb",
  "homepage_url": "https://wixiweb.fr",
  "icons": {
    "48": "icon.png",
    "96": "icon@2x.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d2e2c022-f8fd-47ee-8d64-bf01fab7fea9}",
      "strict_min_version": "109.0"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "/assets/*"
      ],
      "matches": [
        "https://twitter.com/*",
        "https://x.com/*"
      ]
    }
  ],
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "https://twitter.com/*",
        "https://x.com/*"
      ],
      "js": [
        "main.js"
      ],
      "css": [
        "main.css"
      ]
    }
  ]
}