Rated 4 out of 5 stars

yazan: Sandro tarih: Nisan 15, 2025 ·

Thunderbird 137.0.1: I installed the extension version 3.1.1 but it doesn't work.

This review is for a previous version of the add-on (3.1.1). 

yazan: Christopher Leidigh (Geliştirici) tarih: Nisan 15, 2025 ·

Sandro
Sorry for the issue.
Since I can't help you here, can you post on issue in the Github repository where I can help debug your problem.
https://github.com/cleidigh/printing-tools-ng/issues

Christopher