What is a one sentence summary of your feature request?
Why don’t you publish the Password Secure Firefox AddIn also in the Thunderbird Add-On Store?
Please describe your idea in detail. What is your problem, why do you feel this idea is the best solution, etc.
A customer asked, if the Firefox Password Secure Add-On also works on Thunderbird - and it does. So why don’t you publish it also on https://addons.thunderbird.net/de/thunderbird/extensions/
How do you currently solve the challenges you have by not having this feature?
You can simply download the latest Version from Version history as xpi-File and install it manually in Thunderbird. But automatic updates won’t work (maybe).