They haven’t modified apt; they abuse an extra version number that supercedes the major version number of a package. I think it’s meant to be used for new packages that reuse the name of an abandoned project. Canonical publish packages for software like Firefox that depend on snapd and just run snap install firefox instead of actually installing anything. Since they bumped that extra version number, their packages always have a higher precedence than even the officially packaged debs from Mozilla.








Was it not so bad when the (ex) soviets did it?
https://en.wikipedia.org/wiki/Znamya_(satellite)