Lacks search in page. I would really like a real two-way bookmark sync : Firefox iOS will rather let you access bookmarks of your desktop Firefox instead of syncing then. Hopefully, the roadmap states that this will be fixed version 3 (late March).
Tab sync between desktop and mobile is not as cool as with Safari.
Like many others, I feel frustrated by the tabs overview. I prefer Safari style.
At least, I can get my desktop bookmarks and passwords which is the reason why I chose Firefox.
Keep up the good work guys !
Dreadcast about Firefox: Private, Safe Browser, v2.0