Currently if you’re on the search results page on flathub and you select some categories. then you click on a result. then go back (by using your browser back button) it’ll have forgotten what categories were selected.
There are various ways of solving this but i personally would prefer it to have url parameters every time you change an option (this doesn’t require a page reload it can be done using this I think)
So something like this:
Could be https://flathub.org/apps/search?q=time+tracking&categories=productivity&license=free-libre-open-source&verification=verified
(apologies if this request already exists, couldn’t find one)