Installing Thunderbird from PPA

[Şerban S.]

There's both a Firefox and Thunderbird PPA in 7x and no snap.

Sent from my Mobile phone using Tapatalk

That is weird! Why then the setup pushed the snapd?
I have to mention that the download I made, was at about 01:00 (UTC+3) on the first of June.
I also installed it on my primary machine (Dell, but on a different drive) for testing purposes.
When I run the custom setup script, it has in it a "sudo apt install ***" and among many others, it has Thunderbird too.
Since I run many things lately from the CLI, I could see the message regarding "installing snapd". This drove me crazy. I never liked the philosophy behind Snap/snapd.
Am I supposed to download another ISO? Did you make changes in the initial release?
I'd like to have the latest release. I usually keep a long time the latest root of the OS version (5.0, etc.), since it can be upgraded for years. I guess that I still have the LL 5.0 and LL 6.0 somewhere on the backup drives. Possibly, even older ones (3.x, 4.x).

For what is worth, when I searched for a solution based on Mozilla PPA, I discovered that there is a catch with the snapd: it seems that there is a priority flag attached to this installation which overrides the Mozilla PPA installation, thus hijacking the initial installation. See the last lines of code for the Mozilla PPA installation.
The code changes the priority of the snap update/upgrade process from 1001 to -1 putting the Mozilla PPA on the first level of priority.
Maybe that's why the PPA was hijacked.
I'll test the installation on ASUS X200MA to check if it is true.
I will also re-download the ISO, just in case.

Best regards, Șerban.