5 ਤਾਰਿਆਂ ਵਿੱਚ 4 ਮਿਲੇ

Very good, but where is the delete button for the outdated extensions?

ਇਹ ਸਮੀਖਿਆ ਐਡ-ਆਨ (1.9.1) ਦੇ ਪਿਛਲੇ ਵਰਜਨ ਲਈ ਹੈ। 

it is not possible or allowed by Thunderbird to delete them automaticall. You need to go to extra-> addons and delete them manually