SpeedyFox is a very light utility developed to boost the speed of Mozilla Firefox, a web browser already famous for the high speed it provides.
The application has been specifically designed with this goal in mind, so it doesn't comprise any other tool besides the dedicated feature to increase the web browsing speed.
In this regard, SpeedyFox relies on a minimal interface, with only a few options displayed in the main window.
Basically, it does the whole speed boosting job by solving fragmentation problems. We still don't know how exactly it achieves that because there's no help file included in the package, but developers assured that the entire process is 100% safe, so you don't risk to get your data compromised.
You just need to select the profile you wish to optimize, which can be either the default one or another profile stored on your computer. There's a single option in the main window, “Run Firefox after optimization”, and that's it.
It's important to keep in mind that Firefox needs to be closed when running the optimization, otherwise SpeedyFox has absolutely no effect on your web browser.
Although it may very well be a placebo effect, SpeedyFox seems to increase the speed of Mozilla Firefox, but don’t expect very significant changes. It does solve fragmentation problems, but nothing more.
So the conclusion is that SpeedyFox is worth a try once Mozilla Firefox starts losing its agility, with a very user friendly approach and minimal configuration settings.