Chrome extension ideas.

Small installs with built-in distribution: extensions that solve one browser-shaped problem.7 ideas, each with a copy-paste build prompt.

// 7 ideas

ATS duplicate checker while sourcing on LinkedIn

Agency recruiters waste outreach on candidates already in their ATS; this extension flags known profiles and past contact history as they browse.
B2B Chrome extension 1 week
Sold-comps stats on eBay search pages

Resellers eyeball sold listings to price items while sourcing; this overlays average, median, and sell-through rate right on the eBay sold-search page.
Micro-SaaS Chrome extension weekend
True profit overlay on the Etsy dashboard

Etsy sellers see revenue, not profit, and fee changes quietly eat margins; an overlay shows real per-listing profit after fees, shipping, and materials.
Micro-SaaS Chrome extension weekend
CI cost overlay inside the GitHub UI

CI minutes burn money invisibly; this overlays dollar costs and cache-miss warnings on every workflow run right in the GitHub UI.
Dev tool Chrome extension weekend
Turn real API traffic into MSW mocks

Writing API mocks by hand is tedious guesswork; record real traffic in DevTools and export ready-to-use MSW handlers and fixtures.
Dev tool Chrome extension weekend
Shopify order context inside Gmail support inbox

Small e-commerce teams answer support email while tab-switching to Shopify; this sidebar shows the sender's orders, tracking, and refund actions.
B2B Chrome extension 1 week
Meeting cost ticker for Google Calendar

A Chrome extension that shows the real salary cost of every meeting on the invite. Viral by design — screenshots of a $3,400 status meeting share themselves.
B2B Chrome extension weekend