Examine source code of qwiklinks

{
  "manifest_version": 2,
  "name": "qwiklinks",
  "author": "Ruyi Li",
  "version": "1.1",
  "description": "Access long URLs with short, easy-to-remember names.",
  "browser_specific_settings": {
    "gecko": {
      "id": "qwiklinks@ruyili.ca"
    }
  },
  "developer": {
    "name": "Ruyi Li",
    "url": "https://ruyili.ca/"
  },
  "icons": {
    "16": "/icons/qw-16.png",
    "128": "/icons/qw-128.png"
  },
  "omnibox": {
    "keyword": "qw"
  },
  "background": {
    "scripts": [
      "qwiklinks.js"
    ]
  },
  "permissions": [
    "storage",
    "downloads"
  ],
  "browser_action": {
    "default_icon": "/icons/qw-128.png",
    "default_title": "qwiklinks",
    "default_popup": "/ui/index.html#popup"
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "/ui/index.html"
  },
  "content_security_policy": "style-src 'nonce-style'; script-src 'self';",
  "__QW_STORAGE_KEY": "qw.links"
}