Frisian Dictionary is a Thunderbird add-on that utilizes Fryske Akademy's word list to offer Frisian language support.
Then, open Mozilla Thunderbird and navigate to the "Add-ons" section in the Tools menu. From there, click on the "Install" button and select the file you just downloaded. Confirm your selection by clicking "OK." Now, you can enjoy the benefits of the Frisian Dictionary add-on for Thunderbird.
Version 2.0.0: N/A