After creating a fresh installation of Ubuntu 24.04, I installed DEB Firefox from APT by following Mozilla’s instructions from here. But I noticed that it was secretly replaced with Snap Firefox. I was able to verify this by checking the About Firefox page. This is the third time I noticed this.
I’m aware that when the user runs(without adding Mozilla’s apt repository),
sudo apt install firefoxthe snap version of Firefox is installed. But I never heard that, though APT is configured to install Firefox from Mozilla’s repository, the DEB version will be uninstalled and the Snap version will be installed.