Looks great!
I'll wait for the OSX version. Also - vim or emacs shortcuts would be appreciated.
Being open source and hosted on Github, I doubt that will be a problem. The Mac community is rather active.
By the way, here's my vote for VIM keybindings!
Do you have a Paypal address that we could donate to?
For donations: https://cretz.github.io/doogie/guide/faq#where-can-i-donate-...
Although, for a Vimperator replacement because of the breaking FF/Vimperator upgrades, I've found VimFX to be pretty awesome. I had to write some configuration scripts to get d/D to drop tabs like Vimperator, but other than that it works very well.