We're jumping the gun by a bit here....
Firefox 1.0 is still some distance away.
The link above is for the nightly build of an RC (testing) build of a beta build (0.10). And zero-point-ten is still not the same as one-point-zero. The mozilla roadmap shows 0.11 and 0.12 as well. So, even the v0.10 isn't out yet - The big one-oh is some way to go yet.
This is not a put-down for fans - just a heads-up, so that people won't take this build and then declare that v1.0 is not good. By all means test this build, but remember its not final.
This image is the best way to make it clear:
yesterday i downloaded PR (Pre Release) and i DON'T recommend it to any1. it still has a lot of bugs and for example, .exe and .zip files are taken as a streaming object (i don't know what firefox developers want to do with this), maybe it's a future feature of the download manager...