Wow. It can definitely be done, and it doesn't look difficult at all! I just did a quick google search and I found this.http://stackoverflow.com/questions/3892 ... col-e-g-so
If it looks like greek, it's no problem. That site is a question and answer site for software developers. But it explains how to create your own URI scheme to have the app open and do something when a link is clicked. Pretty slick stuff.
As for your feature request, it shouldn't be very difficult to create an extension or plugin that takes highlighted text and "clicks" it after adding "tr://" before it. That's all it would take. Maybe I'll bump this feature up, since it doesn't seem to difficult.
Would you prefer a Chrome or FireFox extension? Or both?