Firefox - Search NCBI using keyword with a parameter

Question

For example, say I configured the keyword jaba with this url: https://www.ncbi.nlm.nih.gov/pubmed/?term=%22Journal+of+applied+behavior+analysis%22[Journal]+AND+%22%s%22

Where "%s" is would be, say, a research question, like "verbal behavior." Whenever I attempt to search NCBI using this keyword, it just brings me to a page displaying all the journal articles without passing the parameter.

It'd be a drastically improved workflow if I could pass the parameter from the awesomebar, and it would look cool, too.

Any help would be much appreciated. I will keep tinkering, and if I solve it I'll post here because I'm sure I'm not the only research monkey on these forums using Firefox.