Some retailers launched online deals well in advance of Thanksgiving, Black Friday and Cyber Monday.
Costco led Internet Explorer tests and OfficeMax took the Firefox lead.
Costco.com had the best availability score for Internet Explorer testing among large retailers tested in December, says Compuware. The retailer posted 100% availability in Internet Explorer tests. OfficeMax.com led Firefox availability tests also at 100%.
Five retailers—HPShopping.com, HSN.com, LLBean.com and Macys.com—tied in second place in Internet Explorer testing with an availability rating of 99.99%.
HSN.com came in second place behind OfficeMax in Firefox testing at 99.99%. Amway.com and Costco.com tied in third place for December Firefox availability testing at 99.98, and three retailers (Amazon.com, OfficeDepot.com, Sears.com) tied in fifth at 99.97% availability.
The average Internet Explorer availability score among the 22 retailers measured in December was 99.88%. The same group of retailers produced an average Firefox score of 99.87%.
Availability is determined by the percentage of tests in which the retailer’s web site loads correctly.
Click here to view the full test results.