Unless Deebo's injury is going to be long term, I don't think they will go after a WR. Mostly likely an edge rusher to play opposite Bosa. None of their experiments there have worked this year. They just traded for Gregory a couple weeks ago and he is serviceable there as part of a rotation but isn't going to be the no brainer solution.

They could also upgrade at CB and OL but it will be really hard to pry away a high quality OLineman.

There are rumours they might be interested in Cordarrelle Patterson as CMC/Deebo insurance since can be useful in both the run and pass game similar to those guys. I don't think that's their immediate need though so I think that would be a situation that if Falcons wanted to get rid of him the 49ers would be happy to add the depth but they aren't going to reach to get him.