Rated 5 out of 5 stars

On an old computer, the update to version 115.2.0 retained this extension, while deactivating it. But it still works (!) and I can still obtain the real email address of the senders (the only useful one, because the one indicated by default in the application is just a simple comment and can be spoofed easily: I sometimes receive spam from my own name!). Therefore I am in the process of seeing how to reintroduce this extension on the stations where it could not be reinstalled.
If I can't, I'll have to reinstall the old version of Tunderbird where it was supported, or more likely use another mail program...

This review is for a previous version of the add-on (1.0.4).  This user has a previous review of this add-on.