Rated 5 out of 5 stars

The addon is great and works as intended. Big thanks to the author for making it! The only real issue I have experienced with it recently is that it does not allow you to link attachments to Dropbox when your file name contains the Polish characters such as ż ą ę etc. It seems they are not supported. When I remove such characters from a file name, the addon allows to link them into Dropbox. Otherwise it displays an error message: "An unknown error occured when communicating with ." - Yes, there is a white space in the end and a "." character. Dear author if possible, please solve this issues. Thank you.

UPDATE: Yes, exactly, I meant the FileLink Provider for Dropbox addon. Thank you for your quick reaction and the bug report!

UPDATE 2: It seems the issue is solved now. Thank you very much for your kind support! Bumping up the rating to 5 stars :D.

This review is for a previous version of the add-on (1.2). 

Thanks for the review! This add-on is not for Dropbox, so maybe you meant it for the "FileLink Provider for Dropbox" add-on. Anyway, I was able to confirm the issue, which is actually a Thunderbird 102 regression that affects all FileLink add-ons. I reported it to them: https://bugzilla.mozilla.org/show_bug.cgi?id=1789589