I actually added a custom search engine to Firefox… so I can search something on Lemmy. I have the keyword ‘LW’ for Lemmy.World search right now (because Lemmy.ml was offline a while).
Basically, do the Lemmy search (search term ssss) then edit/replace ssss > %s and copy the entire link. https://lemmy.world/search/q/%s/type/All/sort/TopAll/listing_type/All/community_id/0/creator_id/0/page/1
Then using ‘add custom search engine’ extension on Firefox, you add it.