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What the Extension Does
The PriceMirage Chrome Extension works quietly in the background as you browse shopping sites. When you land on a product page at Amazon, Walmart, Best Buy, Target, or any of our 30+ supported retailers, the extension automatically identifies the product and overlays key pricing intelligence directly on the page. You see the current prices at competing retailers, the 365-day price history spark chart, and the PriceMirage deal score without ever leaving the page you are on.
Installing the Extension
Visit the Chrome Web Store and search for PriceMirage, or click the install link on our homepage. Click Add to Chrome and then confirm the permissions. The extension only needs access to read product pages on shopping sites. It does not track your general browsing, collect personal data, or inject ads. After installation, you will see the PriceMirage icon in your browser toolbar. A green badge appears on the icon whenever pricing data is available for the product you are viewing.
The Price Comparison Overlay
When you visit a supported product page, a compact overlay panel appears near the price showing prices at other retailers. Each listing shows the retailer name, current price, and whether the price is higher, lower, or the same as the page you are on. Click any retailer name to open that product page in a new tab. The overlay saves you the tedious work of searching each retailer individually and ensures you never miss a lower price that is one click away.
Understanding the Deal Score Badge
A color-coded badge appears next to the product price showing the PriceMirage deal score. Green with a score above 70 means the current price is a genuinely good deal based on historical data. Yellow between 50 and 69 indicates a fair price that is not the best we have seen but is reasonable. Red below 50 means you are likely paying above the typical market rate, and waiting for a sale would save money. The badge gives you instant confidence to buy or patience to wait.
Inline Price History
Click the PriceMirage toolbar icon while on a product page to expand the full price history panel. This shows a 365-day price chart for the product across all tracked retailers. You can see seasonal patterns, identify typical sale prices, and determine whether the current price is truly a discount or just a normal fluctuation. The chart also marks major sale events like Prime Day and Black Friday so you can see exactly how prices behaved during past promotions.
Setting Alerts from the Extension
The extension includes a quick alert button. Click it, enter your target price, and you are done. No need to visit PriceMirage.com separately. When any retailer drops to your target price, you receive a browser notification and an optional email alert. This turns casual browsing into an effortless deal-finding workflow where you spot products you want and set alerts in under five seconds.
Power User Tips
Enable the auto-compare feature in extension settings to automatically highlight when the product you are viewing is not the cheapest option. Turn on price drop notifications to get alerted when any product you have recently viewed drops in price, even if you did not set a manual alert. Use the keyboard shortcut Alt+P to toggle the overlay on and off without reaching for the mouse. These features together create a seamless shopping experience where you always have pricing context without any extra effort.