Some users will not accept this transition. There are signs that modern Ubuntu versions will ship Firefox as a Snap. Currently it is not needed, but let's save it for the near future. I have already prepared a draft titled 'Ways to avoid Snap version of Firefox web browser'.

Way to avoid Snap version of Firefox and continue to use deb-package on freshly installed Ubuntu MATE 21.10

The fact is that this version works fast. In other words you must first get rid of snap and after that load mozilla ppa reposotiries sudo add-apt-repository ppa:mozillateam/ppa -y I am not yet aware what this version is but I guess it has an extended support release intended for enterprises. I have completely removed snapd and dependencies based upon some guide found in internet and after using mozilla ppa I installed via apt 'firefox-esr' version 91. and I have found a second bug and it is that when trying to backup or restore bookmarks firefox does not interact with caja and you cannot get latest backup or make a new one. After fighting a long while trying to determine wether Firefox 98.0.2 has a slow startup of about 20 seconds the first time after booting, I have came to the conclussion that either with ubuntu repositories or with mozilla ppa repositories in both cases firefox is installled with snap and in both cases firefox (at least in my 22.04) last very much to load.

Remove mozilla firefox esr