This works quite well, once you work out the proper URL of the website's search box. It seems the way it works is to copy a sample search return URL (eg: for eBay Australia, https://www.ebay.com.au/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw=[EXAMPLE] ) and substitute [EXAMPLE] with the "%s" from the instructions