Examine source code of NoBlueCheckmarks

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "NoBlueCheckmarks",
  "description": "Hide blue checkmarks on X/Twitter",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://twitter.com/*",
        "*://x.com/*"
      ],
      "js": [
        "src/main.js"
      ]
    }
  ],
  "browser_action": {
    "browser_style": true,
    "default_title": "NoBlueCheckmarks",
    "default_popup": "/src/popup.html",
    "default_icon": {
      "16": "/icons/16.png",
      "32": "/icons/32.png",
      "48": "/icons/48.png",
      "128": "/icons/128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{79f8c6d1-0cf2-43c7-ad54-351eaedbd3ee}"
    }
  }
}