This extension has saved me a lot of time. It creates an option in the double click menu that when pressed opens a new tab with the highlighted text already populated in and searches it right a way. This is obviously much faster than opening a new tab, finding the right search field, and typing in your query.
If my wording wasn't clear here's a visualization of how the extension works.
Is there anyway to create a macro that does the same thing? I don't need a double click menu, a regular trigger would be fine.