With Add-ons (Extensions & Themes) and many more features you can change the look and feel of Thunderbird in an instant.
S useqdec n yizegrar (isiɣzaf akked isental) d ddeqs n wugar n tmahilin-nniḍen, tzemreḍ ad tbeddleḍ udem d uḥulfu n Thunderbird deg kra n wakud kan.