Examine source code of Prolific Sidebar Toggle

{
  "manifest_version": 3,
  "name": "Prolific Projects Sidebar Toggle",
  "version": "0.1",
  "description": "Adds a small toggle button to show or hide Prolific’s Projects sidebar.",
  "browser_specific_settings": {
    "gecko": {
      "id": "prolific-projects-sidebar-toggle@trevorbrowning.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "collects_data": false
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://app.prolific.com/*"
      ],
      "js": [
        "script.js"
      ]
    }
  ]
}