Examine source code of OnLinks

{
  "manifest_version": 2,
  "name": "OnLinks",
  "version": "1.0.0",
  "description": "A browser extension that gathers, organizes, and inspects links.",
  "homepage_url": "https://www.onlinks.space",
  "permissions": [
    "bookmarks",
    "storage",
    "activeTab",
    "https://link-roamer.zaidmukaddam.repl.co/*"
  ],
  "background": {
    "scripts": [
      "assets/background-c101863b.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": {
      "16": "public/icons/production/16.png",
      "24": "public/icons/production/24.png",
      "32": "public/icons/production/32.png"
    },
    "default_popup": "public/index.html"
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+U",
        "mac": "Command+U"
      }
    }
  },
  "web_accessible_resources": [
    "public/onboarding.html"
  ],
  "icons": {
    "48": "public/icons/production/48.png",
    "64": "public/icons/production/64.png",
    "128": "public/icons/production/128.png",
    "256": "public/icons/production/256.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{57cea2ad-1e5d-4a71-9143-37f465eb545d}"
    }
  }
}