QVC.com finished first among large retailers Internet Explorer availability tests in April, says Compuware Gomez. Last month, the retailer posted an availability score of 99.99% for Internet Explorer.

Dell.com and Staples.com each posted a 99.98% availability score in April’s Internet Explorer availability testing, followed by Sears.com (99.97%) and Amazon.com (99.96%).

Dell.com and Sears.com tied for the best Firefox browser tests with a score of 99.98% availability. QVC.com was next (99.96%), followed by Amazon.com and Toysrus.com (tied with 99.95%).

The average Internet Explorer availability for the 21 retailers measured in April was 99.87%, according to the Compuware Gomez Benchmarks study. The average Firefox availability for the same group of retailers was 99.69%.

Click here for the full test results.