Examine source code of PubChem Quick Search

{
  "manifest_version": 3,
  "name": "PubChem Quick Search",
  "version": "1.0",
  "description": "Quick search for PubChem",
  "browser_specific_settings": {
    "gecko": {
      "id": "pubchem-quick-search@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "tabs",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "https://pubchem.ncbi.nlm.nih.gov/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon48.png"
    }
  },
  "icons": {
    "48": "icon48.png"
  },
  "omnibox": {
    "keyword": "pc"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}