Mozilla has been in the workshop putting together a tablet version of Firefox for Android. Although its not the official version there is one available that just been released into Nightly Builds, A.K.A. Beta.
Keep in mind if you decide to give this Firefox version a go that its just in testing and there will be bugs, possible crashes. Mozilla asks that you notify their team with any issues you come across in order for them to fix outstanding issues.
You can download the Nightly Builds version by follow this link. Once you get it up and running lets know what you think.