I’m on the official monthly release of Thunderbird, and I’m unable to install the LT add-on, I lost the extension since I move from esr release channel to monthly channel, but now I see the de extension is listed as compatible:
We’ve decided to centralize the professional support for LanguageTool at https://help.languagetool.org, where your can also contact the support team directly. As of June 2025, this forum will not be monitored by the LT support team anymore, so I suggest you email the support team directly.
