If it's a URL , it just goes to the website. If not, it performs a search of it.
As it's on the new-tab button, it will do it on a new tab instead of current one.
Please offer such a functionality. Attached a sample of how it looks on Maxthon.
Optionally, also offer an API for addons to handle this operation.
Currently I couldn't find any addon that does it, and even one that does it via a toolbar button of the addon itself. Only similar thing is this one:
But it works only on current tab, and can only handle URLs, meaning it doesn't do search&go.