When you click a prefix on a list of threads, it filters to all those prefixes. That is great. The url to do so is: site/thread.id/?prefix_id=2 , for example. Is there a way we can filter to multiple prefixes by altering that URL, ... OR by calling all in a group instead? ?prefix_id=2+3+4 ?prefix_id=2,3,4 or ?prefix_group_id=8 There is a Waindigo add-on that lets you filter by multiple prefixes but, I would like to be able to do it via a single link. I know you can with a search string using &c[prefix]=1+2+3+4 .. but, then it returns on a standard search results page rather than just thread listings. Appreciate any help.