Examine source code of Click and Clean

{
  "action": {
    "default_icon": "static/icon-128.png",
    "default_title": "Click and Clean"
  },
  "background": {
    "scripts": [
      "sw.js"
    ]
  },
  "commands": {
    "clean": {
      "suggested_key": {
        "default": "Ctrl+Alt+C",
        "mac": "Command+Alt+C"
      }
    }
  },
  "description": "Quickly delete your browsing data - open windows, browsing history, cookies, downloads history, form data, caches etc.",
  "icons": {
    "48": "static/icon-48.png",
    "128": "static/icon-128.png"
  },
  "manifest_version": 3,
  "name": "Click and Clean",
  "options_page": "options/options.html",
  "permissions": [
    "browsingData",
    "notifications",
    "storage",
    "declarativeNetRequest"
  ],
  "version": "0.2.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{14af9ece-808c-4252-8480-522e15703a77}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "blockads",
        "enabled": true,
        "path": "blocker.json"
      }
    ]
  }
}