Examine source code of Quest PDF

{
  "manifest_version": 3,
  "name": "Quest PDF",
  "version": "1.0.4",
  "short_name": "Quest PDF",
  "description": "Fast and Focused Search for PDF Files",
  "icons": {
    "16": "icons/png/16x16.png",
    "128": "icons/png/128x128.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/png/16x16.png"
    },
    "default_title": "Quest PDF",
    "default_popup": "popup.html"
  },
  "background": {
    "page": "page.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "support@questpdfaddon.com",
      "strict_min_version": "58.0"
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "*://*.questpdfapp.com/*"
  ],
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "questpdfapp",
      "keyword": "questpdfapp",
      "search_url": "https://search.yahoo.com/yhs/search?hspart=sz&hsimp=yhs-032&p={searchTerms}&type=type80175-2799612302",
      "suggest_url": "https://suggesting.questpdfapp.com?q={searchTerms}",
      "search_url_post_params": "",
      "suggest_url_post_params": "",
      "encoding": "UTF-8",
      "is_default": true
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "omnibox": {
    "keyword": "p"
  },
  "homepage_url": "https://www.questpdfapp.com/"
}