Maybe I’ve installed too many plugins? I have close to 20.
Edit: It was just an issue on Arch Linux.
No, I am 40 plugins all active and they have not changed my browser load time almost at all.
Make sure there are no other issues. If you are on Arch Linux, there is a problem with xdg-desktop-portal-gnome that if installed will slowdown loading of many programs.
It means Gnome is the only installed Portal protocol manager. Install one of these first, then remove the Gnome one https://wiki.archlinux.org/title/XDG_Desktop_Portal#List_of_backends_and_interfaces