We have an internally written and hosted opensearch plugin which after upgrading to Firefox 7 the suggestions stopped dropping down in the browser. (I don't remember what we were running before) As before when one hits enter it still submits the keyword to the proper page URL. The plugin xml is: <?xml version="1.0"?> <OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/"> <ShortName>Directory Listing v1.1</ShortName> <Description>Directory Listing</Description> <Image height="16" width="16" type="image/x-icon">http://int.bh.com/phonelookup/favicon_phone.ico</Image> <Url type="text/html" method="get" template="http://int.bh.com/phonelookup/phonelookup.php?keyword={searchTerms}"/> <Url type="application/x-suggestions+json" method="GET" template="http://int.bh.com/phonelookup/suggest/suggest.php?format=json&amp;mode=FirstNickLastNumber&amp;keyword={searchTerms}"/> </OpenSearchDescription> suggest.php output (keyword=bill): ["keyword",["Bille, Bntonio, 123","Biller, Bvrum, Dhesky, 202","Darias, Billy, 829","Durran, William, Billy, 265","Fexter, William, Bill, 168","Jamet, Bill, Borris, 262", ]] Thanks for all your help. S. Lewitan