While this new version of Mozilla has been available for a couple of days now, the reason I'm posting is because I downloaded the new Mozilla and I actually liked it and I'm using it as I post.
I think I stopped testing new builds ever since they reached 1.0; back then I still felt that there was a lot to be desired for Mozilla which IMO had this unfinished feel, but no more.
If you are caught in a slow boring Sunday perhaps you will want to give Mozilla 1.3 a try, among old and newer features you have image and pop-up blocking, junk-mail filtering (AKA "spam controls"), image auto-sizing, etc. Plus the program doesn't carry any ads like Opera.