Best Browser Extensions for Ecommerce Sellers in 2026

EZDrop — Viral Product Drops with Referral Waitlist

EZDrop lets merchants create "drops" — limited-slot product releases with a countdown timer and referral waitlist. Customers join the waitlist, receive a personal referral link, and earn higher queue positions for every friend they refer. When the drop launches, the top-N referrers get email access first.

Why it works: The referral mechanic turns every waitlist member into a promoter before your cart even opens. Customers share their referral link because it directly improves their own position — not because they're altruistic. This creates organic social sharing that grows your waitlist without paid advertising.

Best for: Limited edition releases, new product launches, restock events, exclusive collections. Particularly effective for brands with existing social audiences (fashion, streetwear, collectibles, beauty).

Pricing: Free, Growth $19/month, Pro $49/month.

PopBoost — 7 FOMO Widgets in One App

PopBoost combines seven conversion-focused widgets in a single $19/month app, replacing the common pattern of paying separately for each:

• Announcement bar — sticky top bar for promotions and announcements
• Free shipping progress bar — shows how close the cart is to free shipping threshold
• Product badge — SALE, NEW, LOW STOCK, BESTSELLER overlays on product images
• Countdown timer — sale end timer in flip or bar style
• Stock countdown — "Only 3 left!" inventory urgency
• Social proof popup — recent purchase toast notifications
• Exit-intent popup — discount modal when a visitor shows intent to leave

Why it matters: Competitors like Hextom charge $9.99/month per widget. PopBoost bundles all 7 for $19/month flat. The free plan includes all 7 widgets (one active at a time) — useful for testing which widget your store responds to before upgrading.

Pricing: Free (all 7 widgets, one active at a time, PopBoost badge), Pro $19/month (all 7 simultaneously, badge removed), 14-day trial.

EZStock — Inventory Management and Purchase Orders

EZStock fills the gap left by Shopify's discontinued Stocky app (shutting down August 31, 2026). It gives Shopify merchants a full inventory management workflow: supplier database, reorder point tracking, purchase order creation, PDF PO generation, and email delivery to suppliers directly from the app.

Key features: Demand forecasting (30-day sales velocity), low-stock dashboard, bulk product linking to suppliers, editable cost prices on PO forms, CSV export for Growth+ plans.

Best for: Merchants with 50+ SKUs who need a systematic reorder workflow and are currently managing purchase orders in spreadsheets or by memory.

Pricing: Free (5 POs/month), Starter $19/month, Growth $49/month, Pro $99/month.

EZBundle — Reliable Bundle Builder

EZBundle lets merchants create fixed product bundles (predefined product sets) and mix-and-match bundles (customers choose from a collection). Both types generate a Shopify discount code automatically and display a widget on the product page or collection page.

Why reliability matters: The top-rated bundle apps (Bundler, BOLD Bundles, Kitenzo) have consistently poor reviews for bugs at checkout — discounts not applying, cart errors, theme compatibility issues. EZBundle prioritizes reliability over features, making it the low-risk choice for merchants who need bundles to work every time.

Pricing: Free (1 bundle, fixed only), Starter $9/month (5 bundles, fixed + M&M), Growth $19/month (unlimited bundles, analytics), 7-day trials on paid plans.

Shopify Inspector / Koala Inspector

These extensions identify which Shopify apps any competitor store is running, their active theme, and any discount codes or promotions visible in the page source. Valuable for competitive research — see exactly what your top competitors are using before investing in new apps yourself.

Koala Inspector also shows estimated traffic ranges (low confidence but directional) and social media follower counts aggregated from public sources.

Similarweb Extension

Shows estimated monthly visits, traffic source breakdown (direct, organic, social, paid, referral), and top referring sites for any URL. Useful for benchmarking your own store against competitors and identifying which traffic channels drive the most visits to stores in your niche. The estimates are directional (not precise), but useful for strategic planning.

PageSpeed Insights Quick Link

Not a traditional extension, but adding PageSpeed Insights as a browser bookmarklet lets you run a Core Web Vitals audit on any page in two clicks. Shopify stores with poor LCP (Largest Contentful Paint) and CLS (Cumulative Layout Shift) scores rank lower in Google Shopping and see higher bounce rates. Monitor your storefront scores monthly — especially after installing new apps that add scripts.