Rated 5 out of 5 stars

This excellent accessory has long been indispensable for me. Many thanks for it. Unfortunately, the Quicktext toolbar disappeared in my Thunderbird today. I will be grateful for the fix or for any advice how to fix it.

This review is for a previous version of the add-on (4.2). 

Install 4.1 again. Sorry for the inconvenience.

https://addons.thunderbird.net/thunderbird/downloads/file/1019456/quicktext-4.1-tb.xpi