Add-on authors are not obligated to make their add-ons work in beta. Some or all of your add-ons may not work. Or if they do work today, they may not work tomorrow. Consult the <a href="https://support.mozilla.org/kb/thunderbird-add-ons-frequently-asked-questions#w_what-if-my-add-on-is-broken">Add-ons FAQ</a> if you have difficulty. 
Le autores de additivos non es obligate a facer laborar lor additivos in le version beta. Alcun o tote tu additivos pote non functionar. O si illos functiona hodie, illos pote non functionar deman. Consulta le <a href="https://support.mozilla.org/kb/thunderbird-add-ons-frequently-asked-questions#w_what-if-my-add-on-is-broken">Folio a questiones del additivos</a> si tu ha difficultates.