Chrome Web Store Extension Tracker: Users, Versions, Permissions & Rankings

Track any Chrome Web Store extension and get clean JSON, CSV or Excel: users, rating, rating count, version, last update, size, developer, category, manifest version, permissions and host permissions, plus the category rank of top extensions. Built-in change detection tells you exactly what changed since the last run, including new versions, user growth, rating moves and newly requested permissions. With changes only mode you pay only for extensions that changed.

What can this Chrome extension tracker do?

• 📈 Monitor competitors: user counts, ratings and release cadence for any list of extensions.
• 🔐 Security and compliance watch: get alerted when an extension adds permissions (for example tabs, <all_urls>) or switches manifest version.
• 🏆 Category rankings: top extensions (up to 30) in any category, with their rank.
• 🔁 Scheduled monitoring: changesOnly returns and bills only new or changed extensions.
• 🤝 Compliant and private: it follows robots.txt (it never touches reviews, search or support pages) and collects no reviews and no personal data. Only the developer's public display name is included; no emails.

Use cases

Extension developers tracking competitors, security teams auditing extensions in their fleet, VCs and analysts measuring growth, and agencies or researchers mapping categories.

How much does it cost?

$0.002 per extension profile ($2 per 1,000), with no start fee. In changesOnly mode, unchanged extensions are free. The default maxItems of 20 caps a trial run at $0.04.

Input

Field	Description
extensions	Store URLs or 32-letter IDs
categoryUrls	e.g. https://chromewebstore.google.com/category/extensions/productivity/workflow
maxPerCategory	Top N per category (max 30)
trackChanges, changesOnly, stateKey	Change detection and separate watchlists
includeManifest	Attach the full public manifest.json
maxItems	Cap per run (default 20)

{ "extensions": ["https://chromewebstore.google.com/detail/ublock-origin-lite/ddkjiahejlhfcafbddmgiahcphecmpfh"], "trackChanges": true, "changesOnly": true }

Output

{ "id": "ddkjiahejlhfcafbddmgiahcphecmpfh", "name": "uBlock Origin Lite", "developer": "Raymond Hill (gorhill)", "users": 21000000,
  "rating": 4.53, "ratingCount": 3717, "version": "2026.1018.2229", "lastUpdated": "2026-10-19T03:41:31.000Z", "size": "8.72MiB",
  "category": "make_chrome_yours/privacy", "manifestVersion": 3, "permissions": ["activeTab", "storage", "userScripts"], "hostPermissions": ["<all_urls>"],
  "changed": true, "changes": { "version": { "from": "2026.0101.0000", "to": "2026.1018.2229" }, "permissions": { "added": ["userScripts"], "removed": [] } } }

FAQ

Why no reviews? Chrome Web Store's robots.txt disallows review pages, and we respect it. Removed extensions? They're reported in the log and RUN_SUMMARY as not found, and the run continues. Is it legal? It reads only public listing pages that robots.txt allows, in line with Google's Terms of Service, which prohibit automated access only where it violates robots.txt.