Firefox can't open files

I just updated from Ubuntu 20.04 to 22.04 and it looks since then Firefox can't open a file. When I download a file from a website, I get the dialog box "Open with... System Handler (default)". I try that and it looks the file is downloaded but I can't open it or even access the folder when it was downloaded.I have Firefox 105.0.3 (64 bits) Mozilla Firefox Snap for Canonical-002 - 1.0