Examine source code of Focus Friend

{
  "manifest_version": 3,
  "name": "Focus Friend",
  "version": "1.0",
  "description": "ADHD friendly site timer and blocker.",
  "permissions": [
    "tabs",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "focus-friend-adhd@local-extension",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Focus Friend Settings",
    "default_icon": "icon.svg"
  },
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  }
}