Examine source code of Bookmark Switcher

{
  "manifest_version": 3,
  "name": "Bookmark Switcher",
  "version": "3.0.0",
  "description": "",
  "default_locale": "en",
  "action": {
    "default_icon": "./assets/bookmark-switcher-logo-plain.png",
    "default_popup": "./dist/popup/index.html",
    "default_title": "Switch bookmark bar"
  },
  "options_ui": {
    "page": "./dist/options/index.html",
    "open_in_tab": true,
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b49fb79b-230f-4846-bfc4-11c9c99d41d8}"
    }
  },
  "background": {
    "scripts": [
      "dist/background/index.mjs"
    ],
    "type": "module"
  },
  "icons": {
    "16": "./assets/icons/bookmark-switcher-logo-plain-16.png",
    "32": "./assets/icons/bookmark-switcher-logo-plain-32.png",
    "64": "./assets/icons/bookmark-switcher-logo-plain-64.png"
  },
  "permissions": [
    "bookmarks",
    "storage"
  ],
  "commands": {
    "next_bar": {
      "suggested_key": {
        "mac": "Alt+Shift+B",
        "default": "Ctrl+Shift+B"
      },
      "description": "Switch bookmark toolbars"
    }
  },
  "host_permissions": [
    "*://*/*"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}