Hi

I recomend that you contact the add-on and theme community directly at their community forum here. They will be best placed to help you with this issue.

the add-on community dioes not list Firefox Color nor Persona Plus. Both are listed on Mozilla as being developed by mozilla developers

Try to disable automatic update of addons and then install the previous version of Persona Plus (2.0.2).

That is a very bad idea, by disabling add-on updates you leave your machine vulnerable to known issues.

Personas plus is retired. There are no plans to bring it back. Please use the alternatives listed at https://addons.mozilla.org/firefox/addon/personas-plus/

Hello

I have read the Persona Plus pages and the only add-on mentioned as a replacement for Persona Plus is Firefox Color. Firefox color is a joke. Firefox Color does not provide any of the features that Persona Plus provided.

Right now I have the annoying update pop-ups disabled. I will stay at the current version which provides Persona Plus Support.

Currently at 68.0.1

The Raspberry Pi computers are all at much older versions.

The MacOSX are easy to avoid upgrading Firefox. 

If Mozilla keeps up the anti-end user attitude I will just stop using Firefox across all computer, iPads and iPhone.

Mozilla is not the only game in town.