ExtSpot
Libron icon

Libron Chrome Extension Analysis

E-commerce & Dropshipping Utilities

Chrome extension ID: fpfgglfemmnflnmjminpghmeiajcajoi

Libron is a browser extension that displays a library search tool on Amazon product pages. It automatically queries library catalogs (via the Calil API) to notify users if a book they are viewing is available to borrow locally.

Developer:Tsukurusha, LLC
Version:3.0.18
Size:214KiB
Last updated:
View developer profile
External:Chrome Web StoreOfficial website

Overview

Installs

10K+

Rating

★ 4.3

41 reviews

Languages

1 locales

Includes 日本語

Market analysis

Review-backed positioning, friction, and market signals for this Chrome extension.

Backed by review samples

Macro category

E-commerce & Dropshipping Utilities

Pricing friction

Low review signal

Complaint intensity

Low review signal

Listing & review signals
Observed signals from store listing text and review samples.

Listing positioning

Libron positions itself as a convenient browser extension that bridges Amazon product pages with local library inventories. It aims to save users money by allowing them to check book availability at their nearest library directly while shopping on Amazon.

Inferred product pattern

Utility extension that injects data into third-party e-commerce DOM elements using public APIs.

Review-backed pain points

Users have reported frustration regarding missing library coverage in certain jurisdictions and UI elements that interfere with Amazon's chat support or page layout.

Observed feature gaps

Lack of multi-library search results simultaneously and inconsistent compatibility with non-book product categories or specific Amazon sub-categories like Kindle.

Tags
AmazonLibraryBook SearchProductivity
Target users

- Library users

- Amazon shoppers

- Book readers

- Students and researchers

Primary use cases

- Checking book availability at local libraries while browsing Amazon

- Managing reading lists with library loan accessibility in mind

Positive themes

- Increased library usage

- Great convenience for book readers

- Valued integration with Amazon Wishlists

- Helpful tool for discovering local library inventory

Negative themes

- Missing specific regional library coverage

- UI elements overlapping or obscuring other website functions

- Limited functionality for Kindle/e-book category pages

Observed friction

- No pricing friction; the extension is free to use.

Evidence boundary: Analysis based on historical and recent user reviews, developer release notes, and extension store metadata. Review data spans over a decade, meaning some older complaints may have been addressed in recent manifest updates.
Complaint summaries
Review-backed complaint signals grouped by operational area.

Support

Minor complaints regarding missing library entries or UI interference with Amazon components.

Reliability

Occasional reports of the tool failing to detect library status on certain Amazon categories or pages.

Privacy

No privacy complaints observed.

Access & pricing

- Free usage observed

- No account requirement observed

- Free plan or free usage claimed

Store listing facts

Listing assets

- Screenshots: 1

- Videos: 1

- Languages: 1

Trust signals

- Privacy policy

- Developer contact

- Official website

- Support link

Store metadata

- Version: 3.0.18

- Size: 214KiB

- Last updated:

Listing SEO keywords

Search intent keywords
Keyword signals for evaluating how users may discover, compare, or search for this extension category.

Core discovery

Amazon library checkcheck library availabilityLibron extensionCalil API

Comparison

Amazon library extensionlibrary book finder

Problem

find books at libraryis this book in my library

Alternative

Calil browser tool

Similar extensions

Jump to related discovery paths:

More in shoppingMore from this developer

Screenshots

Libron screenshot

Links

Website: libron.net

Privacy policy: https://libron.net/top/pp

Support links: https://libron.net/top/contact

Videos: Watch

Recommended Chrome extensions

Related listings from the same category, trending peers, and the same publisher portfolio.

Browse shopping
Capital One Shopping: Save Now icon

Capital One Shopping: Save Now

Capital One Shopping

A simple and free way to help you save online

Installs

10.0M+

Rating

★ 4.7

Keepa - Amazon Price Tracker icon

Keepa - Amazon Price Tracker

Keepa.com

Adds price history charts and the option to be alerted on price drops to all supported Amazon sites.

Installs

4.0M+

Rating

★ 4.7

Coupert - Automatic Coupon Finder & Cashback icon

Coupert - Automatic Coupon Finder & Cashback

Coupert.com

Automatically find coupons, apply the best coupon code and earn Cash Back rewards to save money for your online shopping.

Installs

3.0M+

Rating

★ 4.7

Rakuten: Get Cash Back For Shopping icon

Rakuten: Get Cash Back For Shopping

Rakuten Ebates

Earn Cash Back on store sites as you shop.

Installs

3.0M+

Rating

★ 4.9

Cashback service LetyShops icon

Cashback service LetyShops

LetyShops

Get cashback for shopping online with LetyShops!

Installs

1.0M+

Rating

★ 4.7

Buyhatke: Price History & Tracker, Spend Lens icon

Buyhatke: Price History & Tracker, Spend Lens

Buyhatke

Buyhatke—Track price history, compare prices, find auto coupons, get alerts & save big with Spend Lens while shopping online.

Installs

1.0M+

Rating

★ 4.8

Méliuz: Cashback e cupons em suas compras icon

Méliuz: Cashback e cupons em suas compras

Méliuz

Ganhe cashback e ative cupons de desconto nas suas lojas favoritas!

Installs

1.0M+

Rating

★ 4.5

Klarna | Shop now, Pay Later icon

Klarna | Shop now, Pay Later

Klarna Bank AB

Automatic Coupons, Points, and Pay Anywhere with Klarna

Installs

1.0M+

Rating

★ 4.8

ShopBack - Cashback & Rewards icon

ShopBack - Cashback & Rewards

shopback-browser-extension

With the ShopBack browser extension, you'll never miss out on earning Cashback and discovering the best deals.

Installs

900K+

Rating

★ 4.1

Smarty icon

Smarty

cesarlambino58

Add coupon codes & get cash back when shopping online! By installing, you agree to the terms at joinsmarty.com

Installs

800K+

Rating

★ 4.2