Examine source code of Twitter Tracking Removal

{
  "manifest_version": 2,
  "name": "Twitter Tracking Removal",
  "version": "1.0",
  "description": "removes tracking params from twitter share link button",
  "content_scripts": [
    {
      "matches": [
        "*://twitter.com/*"
      ],
      "js": [
        "script.js"
      ]
    }
  ],
  "permissions": [
    "clipboardRead",
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2f8077ed-4d91-403d-9df8-41ff21058270}"
    }
  }
}