A bug in the HAR file exported by webpagetest

I came across this bug when I use HAR viewer (HTTP Archive Viewer 2.0.17) to display the HAR file exported by webpagetest. Whichever browser the user chooses to test his website on webpagetest, the exported HAR file always says that the browser is Internet Explorer. It’s not reasonable.
If the user chooses, for example, Chrome to test his website on webpagetest, the HAR file should say that the browser is Chrome, but not IE.

Thanks, opened a bug to track it: Google Code Archive - Long-term storage for Google Code Project Hosting.