Add to ChromeGuide
Install Buy Fast for Prime Day and flash sales
Set up Buy Fast before Amazon Prime Day or Flipkart Big Billion Day — install, pin, configure payment, and test on a normal listing.
Install at least one day before the sale
Sale-day traffic slows retailer sites and Chrome Web Store downloads. Install Buy Fast from the Chrome Web Store, pin it to your toolbar, and open the popup to set payment priority before deals go live.
Save your shipping address and default payment on each retailer you plan to use. Buy Fast uses what is already on your account — it does not create new payment methods.
Configure once in the popup
Pick COD, UPI, Net Banking, or card priority for Amazon. On Flipkart, choose COD, Net Banking, EMI, or manual payment. Enable coupon and SuperCoin options if you use them.
After this one-time setup, sale day is just: open product → flip BuyFast ON → confirm.
Test on a normal listing
Before the sale, open any in-stock product on Amazon or Flipkart and confirm the BuyFast bar appears. Flip ON on a low-value item if you want to walk through the confirmation step once.
If the toggle does not show, check that you are on desktop Chrome and on a supported product page — not a search results or cart screen.