So, there are tendencies and voices to open web content in a sidebar in all browsers but it is not taken as a standard. I would really like this feature to be available in all browsers.
Opinions? Honza Bambas
Target '_search' makes a link open in a sidebar (Opera) or sidebar-like
window (IE). For some offline web apps would be cool to open sidebar by
just one click. In other browsers (Firefox) web content could be open in
a sidebar only by creating a bookmark, marking it as to open in a
sidebar, use (click) that bookmark.
- [whatwg] Should target '_search' be taken as part of HTML 5 ... Honza Bambas
