Examine source code of WAT

{
  "manifest_version": 3,
  "name": "WAT",
  "version": "1.3.1",
  "description": "WAT (Windows And Tabs), a windows/tabs/sessions manager",
  "icons": {
    "16": "icons/16x16.png",
    "32": "icons/32x32.png",
    "48": "icons/48x48.png",
    "128": "icons/128x128.png"
  },
  "permissions": [
    "tabs",
    "storage",
    "clipboardRead",
    "sidePanel"
  ],
  "background": {
    "service_worker": "serviceworker.js",
    "scripts": [
      "serviceworker.js"
    ]
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self'; script-src-elem 'self' 'unsafe-inline'"
  },
  "action": {
    "default_title": "WAT"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "wat-public@jraf.org"
    }
  },
  "side_panel": {
    "default_path": "popup.html"
  },
  "sidebar_action": {
    "default_panel": "popup.html",
    "default_icon": {
      "16": "icons/16x16.png",
      "32": "icons/32x32.png",
      "48": "icons/48x48.png",
      "128": "icons/128x128.png"
    }
  }
}