Compare prices, stack coupons & cash back, and set smart price alerts – right from your browser.

Best Browser Extensions for Saving Money When You Shop Online (2025)

Online prices jump around, coupon codes expire, and “lowest price” claims aren’t always true. The right browser add-ons can do the heavy lifting for you: auto-apply promo codes, compare prices across stores, show price history, and even alert you when something comes back in stock.

How we picked

• Real savings: Auto-coupons and cash back that actually trigger at checkout.
• Coverage: Works at thousands of U.S. stores (plus Amazon-specific tools where relevant).
• Cross-browser support: Chrome/Edge first, many also on Firefox and Safari.
• Active development: Recently updated, with transparent policies and support links.
• Reputation: Solid installs/reviews or credible publishers. We flag any controversies.

Quick picks by use case

Use case	Top pick(s)	Why it’s great
Auto-apply coupons	PayPal Honey; Capital One Shopping; RetailMeNot Deal Finder	One-click code testing at checkout; can stack with cash back on many stores.
Cash back	Rakuten Button; Price.com	Big store coverage, visible cash back rates before you buy.
Amazon price history	Keepa; The Camelizer	Historical price charts + drop alerts so you don’t buy at the peak.
Compare across stores	ShopSavvy; Price.com; OctoShop (Ibotta)	Instant side-by-side prices and stock alerts; helpful for “is this the best store?” checks.
Community-verified deals	Slickdeals Extension	12M-strong community surfaces legit deals; extension auto-applies coupons.

Top browser apps (what they do & why you’ll like them)

Rakuten Cash Back Button

What it does: Activates cash back and applies coupons at thousands of stores. You’ll see a prompt to “Activate” when cash back is available. Why it helps: You stop missing free money and codes at checkout. Works on Chrome/Edge/Firefox/Safari.

PayPal Honey

What it does: Tries coupon codes automatically, shows Amazon-focused tips, and ties rewards to your PayPal account. New AI features are rolling out in 2025. Heads-up: Honey has faced creator complaints about affiliate practices; see our privacy & ethics note below.

Capital One Shopping

What it does: Tests codes, shows price comparisons, and offers rewards you can redeem for gift cards. Heads-up: Currently fighting a lawsuit from creators over alleged affiliate “credit” issues; details in the ethics note.

Price.com

What it does: All-in-one comparison, coupons, cash back, and price history/alerts. Why it helps: Fewer add-ons to juggle; good store coverage.

ShopSavvy

What it does: Real-time price comparisons across 70,000+ retailers, both online and local. Why it helps: Great when you’re checking if a product page price is actually best; also handy for in-store checks.

Keepa (Amazon)

What it does: Injects a price history graph right on Amazon product pages and lets you set alerts. Why it helps: Avoids paying more than the 90-day or yearly average.

The Camelizer (camelcamelcamel)

What it does: Quick Amazon price history and drop alerts via the extension button. Why it helps: Lightweight alternative if you just want a quick check.

Slickdeals Extension

What it does: Taps the Slickdeals community to surface deals and auto-apply coupons; includes cash back at many stores. Why it helps: The community often spots price mistakes and short-lived promos first.

OctoShop (by Ibotta)

What it does: Price comparisons, restock and price-drop alerts; part of Ibotta since acquisition. Why it helps: Especially useful for hard-to-find items or volatile categories (consoles, GPUs, etc.).

Legacy & replacements (what changed by 2025)

• PriceBlink → CNET Shopping: PriceBlink is being retired; the Chrome listing recommends moving to the CNET Shopping extension from the same team. If you still have PriceBlink installed, migrate.
• Fakespot Review Checker: Mozilla shut this Firefox feature down on June 10, 2025. Keepa/Camelizer cover Amazon price history; for review quality, rely on retailer filters and trusted publications.
• InvisibleHand: A classic price-comparison add-on; updates and reliability look inconsistent in 2025. We recommend the modern picks above.

Setup tips to save more (with less hassle)

1. Use 2–3 extensions max: For example, one for coupons/cash back (Rakuten or Honey), one for price history (Keepa), and one for cross-store comparison (ShopSavvy or Price.com). Too many at once can conflict.
2. Turn on alerts selectively: Price-drop alerts are gold for non-urgent buys; use them on big-ticket items.
3. Mind the browser: Chrome’s extension changes (Manifest V3) affect some legacy add-ons. Keep extensions updated, and consider Firefox if you rely on older features.

Privacy & ethics: what to know

Coupon and cash-back extensions usually fund themselves via affiliate commissions. Recently, creators have accused some tools of swapping in their own affiliate tags. Courts allowed parts of a lawsuit against Capital One Shopping to proceed in 2025; PayPal Honey faces a separate creator lawsuit, and Chrome tightened its policy on how extensions can insert affiliate links. Bottom line: these tools can still save you money, but install from official stores, review permissions, and disable any extension on sites where you don’t want link rewriting.

FAQ

Can I stack coupons with cash back?

Often yes. Typical flow: activate cash back (Rakuten/Price.com) → apply best coupon (Honey/Capital One Shopping) → check that cash back still shows as “activated” on the order page.

Why do “price comparison” panels sometimes disagree?

Retailers change prices (and shipping) constantly; some extensions cache data for speed. For big purchases, click through 2–3 sources to confirm.

What’s the minimum set to install?

For most people: one coupon/cash-back add-on (Rakuten or Honey), one price-history tool (Keepa), and one cross-store comparator (ShopSavvy or Price.com).

Try this combo

Quick start: Install Rakuten (cash back + coupons), Keepa (Amazon price history), and ShopSavvy (cross-store comparison). That trio covers 95% of what you’ll need – with minimal overlap.