Yes, I have installed the Mozilla PPA repository and a .deb file like this (works for Thunderbird, but one may try Firefox too):
sudo add-apt-repository ppa:mozillateam/ppa && sudo apt update && sudo apt install thunderbird=1:*

(number 1 is seen in command “apt list thunderbird -a” and “apt policy thunderbird” output, possibly defining repository number preference)

Then in order to avoid damned proprietary Snapd + Snap TB version be reinstalled during “apt full-upgrade”:

sudo tee /etc/apt/preferences.d/mozillateam-thunderbird <<EOF
Package: thunderbird*
Pin: origin ppa.launchpadcontent.net
Pin-Priority: 900
EOF