Examine source code of Discover Less

{
  "manifest_version": 3,
  "name": "Discover Less",
  "version": "1.0.0",
  "description": "A simple extension that hides the 'Discover More' on Twitter.",
  "author": "moohbr@gmail.com",
  "content_scripts": [
    {
      "matches": [
        "https://twitter.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "48": "images/icons2.png",
    "128": "images/icons1.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "moohbr@gmail.com"
    }
  }
}