User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:85.0) Gecko/20100101 Firefox/85.0

Steps to reproduce:

• zoom in with Ctrl + Num+ to 125% for example
• restart program

Actual results:

Zoom level is lost, reset to default, 100%

Expected results:

I think the zoom level should be saved, as in Firefox for example, at least as option.

I had addon to preserve the zoom level, but it was not working good for Write/New mail window and it doesn't work completely in the new Thunderbird version.

I miss also the zoom toolbar buttons for main window and Write/New mail window, as in Firefox.