Examine source code of Multi Notes

{
  "manifest_version": 3,
  "name": "Multi Notes",
  "version": "1.1.1",
  "description": "Keep multiple plaintext notes in the sidepanel.",
  "author": "arthem.babij@gmail.com",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_title": "Multi Notes"
  },
  "sidebar_action": {
    "default_title": "Multi Notes",
    "default_panel": "sidepanel/sidepanel.html",
    "default_icon": "icons/icon16.png"
  },
  "background": {
    "scripts": [
      "service-worker.js"
    ],
    "type": "module"
  },
  "options_ui": {
    "page": "options/options.html"
  },
  "permissions": [
    "storage",
    "menus"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "multi-notes@hedgie.tech"
    }
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Shift+Alt+M"
      },
      "description": "Show Multi Notes"
    }
  }
}