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German dictionary (de_AT) 20180701.1webext
by Björn Jacke
German dictionary igerman98 (de_AT, Austria), for Firefox, Thunderbird und Seamonkey.
About this Add-on
Wer Probleme mit der Installation von Wörterbüchern unter Thunderbird hat, findet hier eine kleine Anleitung:
http://www.j3e.de/thunderbird/how-to-install-a-dictionary.html