I would like to have an option for this extension where I can opt to have it open in a new tab window, kind of like how the Chrome browser works when you middle click a link.
If you do not like this idea, is there any chance you could give me the source code to your extension so that I can add this feature for myself?
Sorry for it took me so long to answer your question. I'm afraid I'm not interested in adding such a behaviour. You can grab the source code from here: https://bitbucket.org/lenant/middleclicktodefinition, if you want to do it yourself.
Thanks for using my extension!