yeah, there are indeed lot things to do/improve comprising both engine level optimization as MANaOS UI.

Regarding the engine, we're running MANaOS over a "raw" MIniMo (http://www.mozilla.org/projects/minimo) build, which is XUL-based application and so still has many unused stuff (/chrome and /res directory e.g.). Furthermore, another possible slowness issue on mozilla-engine itself is that it still relies on the usage of FP for critical actions (actually, mozilla does it by default and CAIRO is coming with much more of it), so although all the efforts of Minimo community to strip down mozilla/firefox regarding the sourcebase itself, there is no a complete "arm-optimized" version of it (like opera does), aiming non-FP based processors. Thus, it really make runtime performance worse than it should be.

anyways, I going to test gnuite .debs out ! Many thanks !

Community support would really make MANaOS end-user-friendly for a near future. Source code will be available soon regardless its status