Thunderbird is no longer funded by Mozilla. Fortunately there is an active community keeping it running and developing it further. But to survive long term, the project needs funding.
Tezriḍ ahat d akken asnerni n Thunderbird ur yezzi terfed-it Mozilla. Acukan, tamezdagnut turmiṭ tettkemmil taneflit ines. Ihi, akken asenfaṛ ad yidir ugar, yesra tadrimt.