Toysrus.com had the best availability score for Internet Explorer testing among large retailers tested in February, says Compuware Gomez. The retailer posted 99.97% availability in Internet Explorer tests. Amazon.com, Apple.com, Toysrus.com and Williams-Sonoma.com led Firefox availability tests at 99.99%.

Gap.com, OfficeMax.com tied in second place behind Toyrus.com in Internet Explorer tests with 99.96% availability. Newegg.com came in fourth at 99.95% availability and Sears.com placed fifth at 99.94%.

With a 99.97% availability score for February, OfficeMax.com finished fifth in Firefox testing, following Amazon.com, Apple.com, Toysrus.com and Williams-Sonoma.com. Overstock.com and Sears.com tied for sixth at 99.96%.

The average Internet Explorer availability score among the 22 retailers measured in February was 99.69%. The same group of retailers produced an average Firefox score of 99.74%.

Availability is determined by the percentage of tests in which the retailer’s web site loads correctly.

Click here for the full test results.