Pale Moon 3.6.0.5 Description:
The aim behind Pale Moon 3.6.0.5 is to build a completely customized version of Firefox that's tailored to make the most of your Windows system. Pale Moon 3.6.0.5 has rebuilt Firefox from source, optimizing the web browser to obtain higher speed rates in page rendering, scripting and menu managing.

Being based on Firefox, Pale Moon 3.6.0.5 features the same stability and reliability as the original browser, as well as support for Firefox extensions and themes. You'll also be able to use most of the program's features and options, though some of them – such as accessibility options and parental controls – have had to be sacrificed in order to use less memory.

Graphically speaking, Pale Moon 3.6.0.5 is identical to Firefox, so you won't notice any difference here. Now, are you really going to notice any significant improvements in speed? That's probably something you will only be able to tell in the long run.