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The two e-commerce sites were tops in Compuware’s Internet Explorer and Firefox testing, respectively, with 100% site availability.
Costco.com had the best availability score in 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 with 100% availability.
In Internet Explorer testing, five web retailer sites—HPShopping.com, HSN.com, LLBean.com, Macys.com and OfficeDepot.com—tied in second place with an availability rating of 99.99%.
HSN.com came in second in Firefox testing, with 99.99% availability, followed by Amway.com and Costco.com at 99.98%. Amazon.com, OfficeDepot.com and Sears.com were next, tied with 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 for the full test results.