Some users have complained that this addon tends to stop working with major Thunderbird updates, and subsequently needs updating, but the following addon has a good workaround to that… 4. This extension lets you add a full calendar to Thunderbird, making it more efficient to schedule appointments from an email. Lightning is Mozilla’s calendar application. Needing to have multiple windows open and toggle back and forth is very inconvenient. You need to be able to quickly look and access your day.
A calendar is one of the most important tools for anyone in business.
