The video referenced in the link below commented about apps being slow to open, I think due to a network setting in Fedora. You could try running top to check if the cpu is busy (which could mean not enough RAM and your system is swapping) or idle (which could mean waiting for a network connection to time-out). Check for network or disk errors in /var/log/messages. On my Fedora 42 laptop (Mate Desktop, i7-12800H, 64GB RAM) the rpm versions of chrome, firefox, gimp, and libreoffice open almost instantly.