To me the dialog box is actually worse, because the program often blocks until you close the dialog box (not 100% sure if that is the case with Firefox).
With GNU Parallel you run 'parallel --citation' once, and you are done. We are talking an effort of 15 seconds or less.
When I install a library I often have to run the install command and it often takes longer than 15 seconds.
Finally, I would like to understand why you do not just use another utility? Would that not solve your issue?
