From Cheat Engine
The speedhack lets a user speed up or slow down a game.
Useful for games where you have to be quick, or when you have a long walk ahead of you and don't want to waste time
One myth is that the speedhack can speed or slow down physical occurrence like download speed, or the speed other people connected to the server experience time. It does not.
If you're interested in how it works, check out Speedhack internals
Cheat Engine does not and can not speed up internet times. Tutorials about doing so simply trick your downloading software into thinking that your internet times are better. It does this by telling you to slow down your downloading software, and when the software is slowed down, the software has a longer idea of what a "second" is(setting your software to half would make it think it's double, etc). This means that more data is downloaded in the software's "second" as opposed to a real second, making the software think that a lot more data is being downloaded in a shorter amount of time than actually is being and the software will show a faster download time when the real download time is a lot slower. As this happens, the user will think that the software is downloading faster when it isn't.
Google Chrome runs plugins in a sandboxed environment, blocking file access, including loading the speedhack-i386.dll file. For 6.2 you can use the forced injection plugin to load the speedhack, but this plugin has not been ported to 6.3 yet. For those that do wish to use speedhack on chrome, launch chrome with the parameter "-no-sandbox". Obviously chrome will bitch about this, but you will be able to use the speedhack without a problem