Firefox 1.5 was recently launched in its final version and we assume that the regular Firefox-users already has downloaded the latest version of the browser. For those who use Firefox, but feel they need some optimizing of the browser, Tweakguides now has published a guide for tweaking Firefox. The Guide is very thorough and plows through everything, from basic options to more advanced tweaking. Interesting for those who really wants to optimize their webbrowser.