You can also have a look at this document: Creating a Note Window with Incident Details
I know it is designed for console, but I think this would also work in webaccess.
But as far as I know there is no other option you have.
You can have a look at the idea section, their you'll find some ER's regarding configuring the start in new tab/window perhaps one of them fits and you vote for them.
Regards
Fabian