Free to use, no account required. We're not on the Chrome Web Store yet, so for now it installs the same way developers test their own extensions — takes about a minute.
Find onelevelhigher-extension.zip in your Downloads folder and unzip it. Keep the resulting folder somewhere permanent — don't delete it after installing, Chrome reads from it directly.
Type chrome://extensions into your address bar and hit enter.
There's a toggle in the top-right corner of that page. Switch it on — this is what allows loading an extension that isn't from the Web Store.
A new button appears once Developer mode is on. Click it, then select the unzipped onelevelhigher-extension folder from step 1.
Visit any Amazon product page — a trust score badge appears in the bottom-right corner automatically.
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