https://pkgs.org should be of help.
BUT , always remember to backup your data/partition BEFORE any installation. You never know.
I had success with Cent OS and Fedora packages, even Ubuntu’s, though they’re a mess to deal with, and I fear that Debian’s can also get tough. It can get “messy” and should you ever overwrite a symlink with a folder, be ready for serious damage. Basically, you must always check what’s going to get merged. Dependencies can also be problematic.
The best shot is to add a third-party repository in swupd to avoid dangerous “DIYs”.
Nevertheless, pkgs.org is exactly the reason why I managed to get Firefox to work with most videos, sooo…
Plus, should you ever doubt the legitimacy of any package, virustotal can give you hints but pkgs does use official repositories unless stated otherwise.
EDIT: somebody is going to hate me for this, but you can install APT from pkgs.org, if it doesn’t break everything apart.