Nice - but I wish it didn't take over the New Tab button since I use that for quick access; Since it's icon is in the status bar, why not just click on it to open a markdown tab?
*Edit: Yes, I know it's in the name of the extension :-) -- just wish I could change the default.
*Edit: Yes, I know it's in the name of the extension :-) -- just wish I could change the default.