How to Reduce Mozilla Thunderbird Memory

Written by nicole martinez Google
  • Share
  • Tweet
  • Share
  • Email

Mozilla Thunderbird is an e-mail client that allows you to check e-mail from private domains and popular providers such as Hotmail or Gmail. If you frequently use Thunderbird or store many e-mails, you may notice that it uses an increasing amount of memory and may lag or freeze. Thunderbird includes a tool known as compacting that can reduce the resources that the program requires and improves performance. For example, compacting may help Thunderbird download or delete messages faster.

Skill level:


  1. 1

    Open Thunderbird on your computer.

  2. 2

    Click on any account in the sidebar.

  3. 3

    Open the "File" menu and click "Compact Folders." Alternatively, you can right-click individual folders and choose "Compact."

  4. 4

    Repeat this process for all accounts.

Tips and warnings

  • You can instruct Thunderbird to automatically compact folders by clicking "Tools," "Options," "Advanced," "Network & Disk Space," "Disk Space," "Compact folder when it will save over 100 KB" and "OK."
  • Deleting or moving messages from your Inbox folders can also improve Thunderbird's performance.
  • Storing large messages or many messages in your Inbox can slow down Thunderbird's performance and cause the program to increase memory usage.

Don't Miss

  • All types
  • Articles
  • Slideshows
  • Videos
  • Most relevant
  • Most popular
  • Most recent

No articles available

No slideshows available

No videos available

By using the site, you consent to the use of cookies. For more information, please see our Cookie policy.