To install something you have to install it from the repository, and not download something from some webpage.
Ah yes, i should have known better than to rely on the documentation of the website of an application i should install. Do you guys really consider this a sane ecosystem? I google what kind of apps there are for what i want. I find the site of one i want to try, it says "here is a deb package for ubuntu", and then hell ensues. And when i share this experience your reaction is "you should have known better" O_o... yeah no. This is just insanity. If according to you even the developers of applications fail to send their users in the right direction on how to get their application installed, there is probably little hope for a mere user like me.
That the ecosystem seems so complex that even developers don't know how they should recommend their users should install an application. Haven't encountered that yet on windows. And i've had plenty of people here tell me "yes, you CAN install deb packages, and many apps will GIVE you deb packages, and the ubuntu page says Debian packages is the very HEART of ubuntu. But you'd be insane to install something like that". Does that sound like a good ecosystem, where people aknowledge that the best way to do stuff is ignore everything app developers & the makers of one of the largest distros say, and do the opposite and ignore apps that you can't install in the way that i should magically know is the best way.
I stand by my words man, but you're free to try to convince me :).