It does not seem all that long ago when Firefox 4 came out and yet now we are looking at Firefox 5, it once officially launched the other day so users are able to get right in there and experience everything that this new browser has to offer. At this point, we would like to be able to say how wonderful it is, but the leap from Firefox 4 to Firefox 5 is not that great.
However, there are some features that users may find interesting and these are those main reasons as to why you should download and use Firefox 5 now;
1. It Respects Your Privacy; 2. It’s Small and Fast; 3. It Supports an Open Web; 4. It Sports 1000 Improvements and finally 5. It’s Secure, Independent and User-Driven
Source [PC World]