The way notifications are currently worded is really cumbersome and often takes too much time to read.
The entire first line that says "email@domain.com received 1 new message" has no real benefit and just adds visual clutter – the notification itself with its large Thunderbird icon already tells me there is a new mail arriving. Line two "Subject from sender" is also difficult to scan, since depending on the length of the subject, the sender name could either be at the end of that line or be pushed into the next. Meaning: there is no pattern between notifications, no way to "muscle memorize" the position of it. Which leads to a long time to read/digest the notification, defeating their purpose: to see at a glance who wrote what.
Ideally, the notification should just print the sender in line 1 in bold, and the subject in line 2. Nothing else (except of course a message preview text if one wants).
(I'm currently usind 140.9.1esr on Windows 11)