Is it possible to avoid Firefox as Snap installation and keep deb-version on Ubuntu 21.10 flavor?

I have just installed fresh Ubuntu MATE 21.10 system.

Then I ran update-manager manually to check and get some new updates.

It showed a surprise for me - it will remove Firefox deb-package as shown on below screenshot to replace it with Snap:

Details of updates

• Install or remove
  • Duplicate packages to be removed
    • Firefox Web Browser

This is not acceptable for me, I want to use normal deb-package of Firefox.

Note: actually the result does not depend on online or offline installation, the first launch of update-manager will try to remove the Firefox deb-package.

Update 20220203 - the bug 1947501 is fixed since 20211103.

So all you need is to run the below commands:

sudo snap remove firefox
sudo apt-get install --reinstall firefox

If you need historic information - check previous revisions of this answer. But keep in mind that running sudo apt-mark manual firefox may be still needed if you install Ubuntu 21.10 flavor using offline installation.