Firefox Throttle

Firefox Throttle is a Windows-only FF extension allowing you to simulate network connections with various bandwidths. A nice tool for a web developer if she/he wants to see how long it takes for an average dialup modem or a broadband ADSL user to get the website content. Here's the mozilla.org page of the extension in case you prefer to get your extensions from there. I wonder why it's Win only? Sad

There're other (external) tools to limit your bandwidth, but this is the only extension I've found for FF.