e-commerce chrome extension price tracking web scraping Chrome Extension JavaScript Supabase
Daraz Smart Shopper — Shopping Assistant Extension
Chrome Extension
About
AI-powered Chrome extension analyzing 60+ data points per product to generate deal scores, detect fake reviews, track price history, and predict price manipulation — with cloud sync via Supabase Edge Functions.
My Role
Built the full extension end-to-end: deal scoring algorithm analyzing 60+ data points, price history charts with Supabase cloud sync, fake review detection engine, and seller reputation aggregation.
Core Capabilities
- Deal Score system (A+ to F) analyzing 60+ data points per product
- Price tracking with local + cloud history and inline SVG charts
- Fake review detection: 5-star inflation, anonymous reviewers, same-day purchases
- Price trend prediction and manipulation detection
- Seller reputation aggregation from community data
- Smart sidebar for collecting products across pages with CSV export
Architecture
- Chrome Manifest V3 with vanilla JavaScript (no build tools)
- Supabase backend for cloud price history and Edge Functions
- DOM mutation observers for SPA-aware page detection
- Inline SVG rendering for price history charts
- Chrome Storage API for local data persistence
Tech Stack
JavaScript Chrome Manifest V3 Supabase SVG DOM APIs Chrome Storage API