Examine source code of Stacklist

{
  "name": "Stacklist",
  "description": "Stacklist saves websites as cards with tags & notes for easy organization and quick access to bookmarks.",
  "manifest_version": 3,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "assets/logo16.png",
    "48": "assets/logo48.png",
    "128": "assets/logo128.png"
  },
  "action": {
    "default_title": "Stacklist",
    "default_icon": "assets/logo128.png"
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_title": "Stacklist",
    "default_icon": "assets/logo128.png"
  },
  "permissions": [
    "activeTab",
    "identity",
    "storage",
    "webRequest"
  ],
  "optional_host_permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "contentStyle.css"
      ],
      "js": [
        "contentScript.js"
      ],
      "all_frames": false,
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f53aef97-3186-4d82-a23f-3a2b816cf5fa}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "host_permissions": [
    "https://us-central1-stacklist-prod.cloudfunctions.net/*"
  ],
  "version": "1.8.0"
}