KDP Lens by US Tech Automations
See observed Amazon.com book ranks, category positions, prices and reviews beside the page you are reading.
Some features may require paymentSome features may require payment
Extension Metadata
Screenshots
About this extension
KDP Lens puts the book information already visible on Amazon.com into a compact panel, so self-publishers can review it without switching tools.
On book pages: observed overall Books or Kindle Store rank, separate category positions, price, review count and publisher. Missing or ambiguous overall ranks appear as Unavailable.
On bestseller lists: the displayed list positions and titles.
On search results: local review averages and a rough publisher-text grouping. These groupings are heuristics, not measured market share.
KDP Lens does not predict sales or earnings. It does not log into Amazon or KDP, publish books, or transmit Amazon page text.
Free and paid
Installation is free, with 10 Amazon.com pages per day. An optional $49 one-time license key lifts the daily limit. Purchase is external to Mozilla: https://ustechautomations.com/feeds/kdp-lens/ . After payment, copy the key from the thank-you page into the add-on popup. The purchase page also describes the existing Chrome edition; the key is for KDP Lens.
Privacy
Page text stays in your browser. Entered license keys are sent to our verification service when verified or rechecked. The local key cache supports up to seven days offline. Scripts, styles and fonts are bundled. No Amazon account is required.
Compatibility
Firefox desktop 140 or later; tested on Linux with Firefox156. This edition supports amazon.com. Firefox for Android and other Amazon country stores are not included.
Support: operations@ustechautomations.com
Privacy policy: https://ustechautomations.com/feeds/kdp-lens/privacy
On book pages: observed overall Books or Kindle Store rank, separate category positions, price, review count and publisher. Missing or ambiguous overall ranks appear as Unavailable.
On bestseller lists: the displayed list positions and titles.
On search results: local review averages and a rough publisher-text grouping. These groupings are heuristics, not measured market share.
KDP Lens does not predict sales or earnings. It does not log into Amazon or KDP, publish books, or transmit Amazon page text.
Free and paid
Installation is free, with 10 Amazon.com pages per day. An optional $49 one-time license key lifts the daily limit. Purchase is external to Mozilla: https://ustechautomations.com/feeds/kdp-lens/ . After payment, copy the key from the thank-you page into the add-on popup. The purchase page also describes the existing Chrome edition; the key is for KDP Lens.
Privacy
Page text stays in your browser. Entered license keys are sent to our verification service when verified or rechecked. The local key cache supports up to seven days offline. Scripts, styles and fonts are bundled. No Amazon account is required.
Compatibility
Firefox desktop 140 or later; tested on Linux with Firefox156. This edition supports amazon.com. Firefox for Android and other Amazon country stores are not included.
Support: operations@ustechautomations.com
Privacy policy: https://ustechautomations.com/feeds/kdp-lens/privacy
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Permissions and data
Required permissions:
- Access your data for www.amazon.com
Optional permissions:
- Access your data for www.amazon.com
Required data collection, according to the developer:
- Authentication information
More information
- Add-on Links
- Version
- 0.1.4
- Size
- 66.28 KB
- Last updated
- 7 days ago (Sep 20, 2026)
- Related Categories
- License
- All Rights Reserved
- Privacy Policy
- Read the privacy policy for this add-on
- Version History
- Add to collection