Yes. Didn't like it and uninstalled it. I'm not a firefox user on my desktop either, though I think the laggyness and ease of use or lack thereof had more to do with it.
I'm sure once a more polished version comes out it will be better.
I gave it a looksie... Performance wasn't terrible, but it has some shortcomings. No full screen mode, can't change the font (doesn't use the default font on your phone).