Top 5 task managers for Mozilla Thunderbird

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Mozilla Thunderbird
Mozilla Thunderbird is probably one of the world’s most well-known email clients. It comes with plenty of features that let you not only send and receive emails, but it lets you organize meetings, schedule your day, and more. Of course, there’s always room for improvement. In the case of Mozilla Thunderbird, these can come in the form of extensions or programs. They can improve an already existent feature of Thunderbird, or add a completely new one. For example, there are plenty of add-ons and tools for Thunderbird that allow you to organize tasks better. Since these can be very useful to those in working environments, we’ve decided to rank the best of the best based on several criteria.

Top Mozilla Thunderbird task managers to use


LightningLightning is arguably one of the most well-known addons for Mozilla Thunderbird.

This is mainly because it was one of the first at giving the email client the calendar, task management, and scheduling tools that it lacks.

More so, it continues to be updated, and this allows it to stay the most popular addon of its kind even as of today.


  • Give Mozilla Thunderbird the task management and scheduling tools it lacks
  • Can be used as a framework for other similar addons
  • Provides you with a calendar tool


  • Pop-ups can be annoying if staked to close together

Download now


Todo.txtTodo.txt is an interesting new way of handling and writing down the things you need to do throughout the day.

It works in conjunction with the Mozilla Thunderbird Lightning add-on and can be used to add task management functionality to the email client.

It will make writing down, managing and marking tasks as completed very easy to do, and you won’t need any other similar third-party program.


  • Can be opened and modified with any text editor


  • Requires the Lightning addon

Download now

Remember the Milk

Remember the MilkRemember the Milk is simple addon for Mozilla Thunderbird that is also available as an integrated service for Google or Gmail.

It is a simple task manager that allows you to input tasks into its interface, organize your tasks, and associate tasks with specific locations. You will then receive notifications right when or prior to when the tasks need to be completed


  • Integrated with Google and Gmail already
  • Easy-to-use


  • More of a list-maker than a scheduler

Download now

Tasks & Mails

Tasks & MailsTasks and Mails is a neat Thunderbird addon that links tasks directly to emails. For example, if you receive an email that requires a follow-up action. you can use the addon to link the task to that particular email.

Microsoft Outlook users may recognize this as the flag feature from their email client. The tasks are then stored with the email in the email folder, making it useful if many of your tasks are associated with emails and RSS feeds.


  • You can use Tasks and Mails to link the task to the guiding email


  • Useless if you frequently ignore notifications

Download now

Provider for Google Calendar

Provider for Google CalendarUsing multiple services is not uncommon nowadays, so using Mozilla Thunderbird in conjunction with Google Calendar isn’t all that odd.

However, switching between one another can be frustrating, so Provider for Google Calendar is here to make things easier.

This neat Thunderbird addon basically links the two services, so that all the tasks and schedules you have on Google calendar can be seen and used from within Mozilla Thunderbird.


  • Links Mozilla Thunderbird to Google Calendar


  • Some features are not cross-compatible

Download now

Closing thoughts on task managers for Mozilla Thunderbird

Unlike other email clients that also have several personal information organizing tools, like Outlook, Thunderbird is just a simple email client.

However, it can be customized with a wide variety of tools and addons that can fill in some of the gaps that it has. These allow you to continue using it without feeling as if you’re missing out on potentially beneficial tools.


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