As a owner of prehistoric N810 I have disagree many of the posters here. RC1 is great! Better in many things than MicroB that N8x0s have in my opinion. Definitely not "firefox rc1 sucks" or "premature ejaculation".

Previous beta was already quite stable in my N810. Cannot say much about the new RC1 after few minutes of browsing. But I can definitely notice the improvements over old version (maybe something to do with JavaScript?). Good work Mozilla team!