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Rated 4 out of 5 stars
But can I download it in English - or I must translate it?This review is for a previous version of the add-on (1.1.2).
So sorry, I have not prepared explanation of English about this add-on yet.
Please wait a moment.
Actually latest version has jp and en-us locale. And If your thunderbird locale setting in en-us, you can see in English.
I will be going to prepare two or more languages in the future.