Simulate Modem speeds with Fiddler

Update (0-Jan-2015): Chrome Developer Tools provides a way to throttle connection speed / bandwidth & artificially limit the maximum download throughput (rate of data transfer)

In the Pluralsight Silverlight 3 Fundamentals video course, the instructor suggests a tip to test a custom progress bar by mimicking a slow web server on the local computer. This can be done by generating modem speeds with Fiddler, a HTTP proxy, using the menu option Rules > Performance > Simulate Modem speeds. The speed can also be customized. This technique is more convenient than using the System.Threading.Thread.Sleep method to create an artifical delay with code.

Firefox Throttle plug-in also allows you to cap download/upload rates and monitor current bandwidth utilization. This plugin seems to be currently removed from the Mozilla add-ons directory but as per this Firefox support Forum its available on the Mozilla FTP server(direct link to .XPI).

Also see:
FiddlerCap makes HTTP Traffic Capture easier

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