QUOTE(uareader @ Aug 12 2022, 08:45)
I use firefox bookmarks for that (but I guess favorites or whatever it's called depending on the browser would work). The f_cats argument in the url save the category filtering, and the f_search argument save the search keywords. Did I miss something in your requirements?
+1. All search options visible on the page have query string equivalents in the URL, so saved URLs reflect all search options, and he should just save the resultant search URLs to his bookmark bar. However, most people are already naturally doing this in some way, and I wonder if he has a reason to avoid this? A script for this is doable but unnecessary, because it only needs to go to bookmarked URLs and the only difference is that the bookmarks are put in a different place.