How to install the Chrome Extension

4 min read·Updated April 2026

The ScanAuctions Chrome Extension enriches car listings on Facebook Marketplace, AutoTrader, eBay Motors, Motorway Pro, CarWow, Gumtree, and Cinch with instant AT/SA valuations and profit margins — right on the listing page. It also captures session cookies, so you don’t have to enter passwords for Motorway or CarWow inside ScanAuctions.

You’ll need Chrome or a Chromium-based browser (Edge, Brave, Arc all work). Safari and Firefox aren’t supported yet.

Install steps

Download the extension

Open https://app.scanauctions.com/download and click “Download extension”. A zip file lands in your Downloads folder.

Unzip it somewhere permanent

Unzip the file to a folder you’ll keep around — for example ~/Documents/scanauctions-extension. Chrome loads the extension from this folder, so don’t delete or move it after install.

Open the extensions page

Type chrome://extensions into the address bar and hit enter.

Turn on Developer mode

Top-right of the extensions page, flip the “Developer mode” toggle to ON. Three new buttons appear at the top.

Load unpacked

Click “Load unpacked” and select the unzipped folder from step 2. ScanAuctions appears in your extensions list.

Sign in

The ScanAuctions icon appears in the toolbar. Click it and log in with the same email and password you use for the web app.

Pin the extension for one-click access: click the puzzle-piece icon in the toolbar, find ScanAuctions, and click the pin. The icon now sits permanently next to the address bar.

Why is it “unpacked”?

Chrome Web Store distribution is coming soon. For now we ship as an unpacked extension so we can push fixes faster while we’re still in early access. Once we hit the store we’ll send out an updated install guide — in the meantime, this is normal and nothing to worry about.

Once installed and signed in, browse to any supported listing — the sidebar will slide in automatically with the valuation, profit estimate, and AT rating.

Which sites does the extension work on?The extension isn’t showing data Connecting Motorway

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