How to set browser type and connection speed?

I’m trying to build a URL for testing but I’m having troubling finding how to pass the browser type and connection type. Currently I have:

To this url I want to add the parameters for browser and connection, how would I go about doing this.

The docs here will help:

But basically you need to specific the location, browser and network connection e.g. Dulles:Chrome.DSL, if you want a custom speed use custom instead on DSL and use the bwUp, bwDown, latency and plr parameters.

getLocations.php will give you the locations and browser combinations