Examine source code of QuickNav

{
  "author": "Opkar Ghadu",
  "name": "QuickNav",
  "manifest_version": 3,
  "version": "1.0.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "quicknav@opkarghadu.com"
    }
  },
  "description": "Quicknav is a browser extension that allows you to add keyboard shortcuts to quickly navigate to different pages.",
  "homepage_url": "https://github.com/OpkarGhadu/quicknav",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "tabs"
  ],
  "action": {
    "default_icon": "icons/icon48.png",
    "default_title": "QuickNav",
    "default_popup": "popup/popup.html"
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "scripts/color.js",
        "scripts/content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "commands": {
    "toggle-feature": {
      "suggested_key": {
        "default": "Alt+Z"
      },
      "description": "Open the QuickNav menu. This is the 'base' of the shortcut"
    }
  }
}