Is Sidewise still in Beta as Chrome indicates? Will you be releasing a stable version.

Thanks for your hard work. I've been wanting to switch from my older version of FF to Chrome since Tree Style Tabs does not support newer FF versions.  Is Sidewise still in Beta as Chrome indicates? Will you be releasing a stable version? I would love to make the move to and use sidewise/ Chrome full time. Please let me know the status. Thanks so much.