MOZILLA ONE URGES YOU!
This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
for security reasons highly recommended:
- always keep Thunderbird up to date (go to … then it should start downloading the update automatically if there is any)
get to Thunderbird’s preferences (in any language edition):
if the “Edit” section is not in one’s toolbar: (one click less X-D but seems only to be in English version?)