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  <id>https://www.thunderbird.net/thunderbird/releases/atom.xml</id>
  <title>Thunderbird Release Notes</title>
  <subtitle type="text">Thunderbird Release Notes feed provides a simple way to keep up to date with Thunderbird releases.</subtitle>

  <updated>2026-03-13T16:30:46+00:00</updated>
  <logo>https://www.thunderbird.net/media/img/thunderbird/thunderbird-256.png</logo>
  <icon>https://www.thunderbird.net/media/img/thunderbird/favicon-196.png</icon>

  <link rel="alternate" type="text/html" href="https://www.thunderbird.net//en-US/thunderbird/releases"/>
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  <entry>
    <id>https://www.thunderbird.net/en-US/thunderbird/140.8.1esr/releasenotes/</id>
    <title type="html">Thunderbird 140.8.1esr</title>
    <author>
      <name>Thunderbird</name>
      <uri>https://www.thunderbird.net</uri>
    </author>
    <link rel="alternate" type="text/html" href="https://www.thunderbird.net/en-US/thunderbird/140.8.1esr/releasenotes/"/>
    <updated>2026-03-10T00:00:00+00:00</updated>
    <published>2026-03-10T00:00:00+00:00</published>

    <content type="html"><![CDATA[
      

  
  

  
    

    
      
        
        

        
          <h3>What’s New</h3>
        

        
        
          <ul>
        

        
        

        <li>
          <p>Add <code>mail.openpgp.load_untested_gpgme_version</code> to load untested GPGME version</p>
          
        </li>
      
    
    </ul>
  
  

<p>As always, you’re encouraged to <a href="https://connect.mozilla.org/t5/ideas/idb-p/ideas/label-name/thunderbird">tell us what you think</a>, <a href="https://support.mozilla.org/questions/new/thunderbird">ask for help</a>, or <a href="https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird">file a bug in Bugzilla</a></p>
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  </entry>
  
  <entry>
    <id>https://www.thunderbird.net/en-US/thunderbird/148.0.1/releasenotes/</id>
    <title type="html">Thunderbird 148.0.1</title>
    <author>
      <name>Thunderbird</name>
      <uri>https://www.thunderbird.net</uri>
    </author>
    <link rel="alternate" type="text/html" href="https://www.thunderbird.net/en-US/thunderbird/148.0.1/releasenotes/"/>
    <updated>2026-03-10T00:00:00+00:00</updated>
    <published>2026-03-10T00:00:00+00:00</published>

    <content type="html"><![CDATA[
      

  
  

  
    

    
      
        
        

        
          <h3>Fixed</h3>
        

        
        
          <ul>
        

        
        

        <li>
          <p>LDAP with password stopped working in 148.0</p>
          
        </li>
      
    
    </ul>
  
  

<p>As always, you’re encouraged to <a href="https://connect.mozilla.org/t5/ideas/idb-p/ideas/label-name/thunderbird">tell us what you think</a>, <a href="https://support.mozilla.org/questions/new/thunderbird">ask for help</a>, or <a href="https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird">file a bug in Bugzilla</a></p>
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    </content>
  </entry>
  
  <entry>
    <id>https://www.thunderbird.net/en-US/thunderbird/140.8.0esr/releasenotes/</id>
    <title type="html">Thunderbird 140.8.0esr</title>
    <author>
      <name>Thunderbird</name>
      <uri>https://www.thunderbird.net</uri>
    </author>
    <link rel="alternate" type="text/html" href="https://www.thunderbird.net/en-US/thunderbird/140.8.0esr/releasenotes/"/>
    <updated>2026-02-24T00:00:00+00:00</updated>
    <published>2026-02-24T00:00:00+00:00</published>

    <content type="html"><![CDATA[
      

  
  

  
    

    
      
        
        

        
          <h3>Fixed</h3>
        

        
        
          <ul>
        

        
        

        <li>
          <p><a href="https://www.mozilla.org/en-US/security/known-vulnerabilities/thunderbird/#thunderbird140.8">Security fixes</a></p>
          
        </li>
      
    
    </ul>
  
  

<p>As always, you’re encouraged to <a href="https://connect.mozilla.org/t5/ideas/idb-p/ideas/label-name/thunderbird">tell us what you think</a>, <a href="https://support.mozilla.org/questions/new/thunderbird">ask for help</a>, or <a href="https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird">file a bug in Bugzilla</a></p>
<style> li p { display: inline; } </style>
      ]]>
    </content>
  </entry>
  
  <entry>
    <id>https://www.thunderbird.net/en-US/thunderbird/148.0/releasenotes/</id>
    <title type="html">Thunderbird 148.0</title>
    <author>
      <name>Thunderbird</name>
      <uri>https://www.thunderbird.net</uri>
    </author>
    <link rel="alternate" type="text/html" href="https://www.thunderbird.net/en-US/thunderbird/148.0/releasenotes/"/>
    <updated>2026-02-24T00:00:00+00:00</updated>
    <published>2026-02-24T00:00:00+00:00</published>

    <content type="html"><![CDATA[
      

  
  

  
    

    
      
        
        

        
          <h3>What’s New</h3>
        

        
        
          <ul>
        

        
        

        <li>
          <p>Accessiblity is improved in various tree views</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>'Favorites' added as destination for 'Move To' and 'File' buttons</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Add <code>mail.openpgp.load_untested_gpgme_version</code> to load untested GPGME version</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>NTLM is exposed as an available authentication method for EWS accounts</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Implemented option to show only messages without any tag</p>
          
        </li>
      
    
      
        
        
          </ul>
        

        
          <h3>Changed</h3>
        

        
        
          <ul>
        

        
        

        <li>
          <p>Read folders are now removed from Unread Folders view</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Yahoo, AT&amp;T, AOL accounts are switched to PKCE, a more secure auth protocol</p>
          
        </li>
      
    
      
        
        
          </ul>
        

        
          <h3>Fixed</h3>
        

        
        
          <ul>
        

        
        

        <li>
          <p>Periodic new mail checks silently stopped after sleep or network outages</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Donation banner stole focus when Thunderbird was running in the background</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Status bar messages displayed unlocalizedd folder names or IMAP mailbox names</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>New Folder dialog allowed invalid folder creation without a selected parent folder</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>New/unread messages in collapsed thread were not obvious enough</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Invalidly signed unencrypted emails were indicated as worse than unsigned ones</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Untagged messages were not working correctly with quick filter</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Calendar/address book sections were shown in Account Hub when there were none</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Shortcuts could be executed on background mail window while in Account Hub</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Adding a Gmail account prompted for OAuth during auto config</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>New password-based Exchange accounts failed to save passwords in login manager</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>'Move Message to' filter action was not logged</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Unknown OAuth providers were not allowed during EWS manual config in AccountHub</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Saved search in unified folder resulted in server error</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>EWS password prompt looped endlessly if the password was empty</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Account Hub manual configuration flow for Exchange accounts was incorrect</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Google calendars had broken RSVP logic and wrong organizer on new events</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>CalDAV calendars that invited calendar alias did not give all response options</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>CalDAV calendar with multiple addresses could crash on multi-attendee invites</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>iCal imports misread unknown timezones as GMT, creating events at wrong times</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Visual and UX improvements</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p><a href="https://www.mozilla.org/en-US/security/known-vulnerabilities/thunderbird/#thunderbird148">Security fixes</a></p>
          
        </li>
      
    
    </ul>
  
  

<p>As always, you’re encouraged to <a href="https://connect.mozilla.org/t5/ideas/idb-p/ideas/label-name/thunderbird">tell us what you think</a>, <a href="https://support.mozilla.org/questions/new/thunderbird">ask for help</a>, or <a href="https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird">file a bug in Bugzilla</a></p>
<style> li p { display: inline; } </style>
      ]]>
    </content>
  </entry>
  
  <entry>
    <id>https://www.thunderbird.net/en-US/thunderbird/140.7.2esr/releasenotes/</id>
    <title type="html">Thunderbird 140.7.2esr</title>
    <author>
      <name>Thunderbird</name>
      <uri>https://www.thunderbird.net</uri>
    </author>
    <link rel="alternate" type="text/html" href="https://www.thunderbird.net/en-US/thunderbird/140.7.2esr/releasenotes/"/>
    <updated>2026-02-16T00:00:00+00:00</updated>
    <published>2026-02-16T00:00:00+00:00</published>

    <content type="html"><![CDATA[
      

  
  

  
    

    
      
        
        

        
          <h3>Fixed</h3>
        

        
        
          <ul>
        

        
        

        <li>
          <p><a href="https://www.mozilla.org/en-US/security/known-vulnerabilities/thunderbird/#thunderbird140.7.2">Security fixes</a></p>
          
        </li>
      
    
    </ul>
  
  

<p>As always, you’re encouraged to <a href="https://connect.mozilla.org/t5/ideas/idb-p/ideas/label-name/thunderbird">tell us what you think</a>, <a href="https://support.mozilla.org/questions/new/thunderbird">ask for help</a>, or <a href="https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird">file a bug in Bugzilla</a></p>
<style> li p { display: inline; } </style>
      ]]>
    </content>
  </entry>
  
  <entry>
    <id>https://www.thunderbird.net/en-US/thunderbird/147.0.2/releasenotes/</id>
    <title type="html">Thunderbird 147.0.2</title>
    <author>
      <name>Thunderbird</name>
      <uri>https://www.thunderbird.net</uri>
    </author>
    <link rel="alternate" type="text/html" href="https://www.thunderbird.net/en-US/thunderbird/147.0.2/releasenotes/"/>
    <updated>2026-02-16T00:00:00+00:00</updated>
    <published>2026-02-16T00:00:00+00:00</published>

    <content type="html"><![CDATA[
      

  
  

  
    

    
      
        
        

        
          <h3>Fixed</h3>
        

        
        
          <ul>
        

        
        

        <li>
          <p><a href="https://www.mozilla.org/en-US/security/known-vulnerabilities/thunderbird/#thunderbird147.0.2">Security fixes</a></p>
          
        </li>
      
    
    </ul>
  
  

<p>As always, you’re encouraged to <a href="https://connect.mozilla.org/t5/ideas/idb-p/ideas/label-name/thunderbird">tell us what you think</a>, <a href="https://support.mozilla.org/questions/new/thunderbird">ask for help</a>, or <a href="https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird">file a bug in Bugzilla</a></p>
<style> li p { display: inline; } </style>
      ]]>
    </content>
  </entry>
  
  <entry>
    <id>https://www.thunderbird.net/en-US/thunderbird/147.0.1/releasenotes/</id>
    <title type="html">Thunderbird 147.0.1</title>
    <author>
      <name>Thunderbird</name>
      <uri>https://www.thunderbird.net</uri>
    </author>
    <link rel="alternate" type="text/html" href="https://www.thunderbird.net/en-US/thunderbird/147.0.1/releasenotes/"/>
    <updated>2026-01-28T00:00:00+00:00</updated>
    <published>2026-01-28T00:00:00+00:00</published>

    <content type="html"><![CDATA[
      

  
  

  
    

    
      
        
        

        
          <h3>Fixed</h3>
        

        
        
          <ul>
        

        
        

        <li>
          <p>Thunderbird crashed during search, even when not actively searching</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p><a href="https://www.mozilla.org/en-US/security/known-vulnerabilities/thunderbird/#thunderbird147.0.1">Security fixes</a></p>
          
        </li>
      
    
    </ul>
  
  

<p>As always, you’re encouraged to <a href="https://connect.mozilla.org/t5/ideas/idb-p/ideas/label-name/thunderbird">tell us what you think</a>, <a href="https://support.mozilla.org/questions/new/thunderbird">ask for help</a>, or <a href="https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird">file a bug in Bugzilla</a></p>
<style> li p { display: inline; } </style>
      ]]>
    </content>
  </entry>
  
  <entry>
    <id>https://www.thunderbird.net/en-US/thunderbird/140.7.1esr/releasenotes/</id>
    <title type="html">Thunderbird 140.7.1esr</title>
    <author>
      <name>Thunderbird</name>
      <uri>https://www.thunderbird.net</uri>
    </author>
    <link rel="alternate" type="text/html" href="https://www.thunderbird.net/en-US/thunderbird/140.7.1esr/releasenotes/"/>
    <updated>2026-01-27T00:00:00+00:00</updated>
    <published>2026-01-27T00:00:00+00:00</published>

    <content type="html"><![CDATA[
      

  
  

  
    

    
      
        
        

        
          <h3>Fixed</h3>
        

        
        
          <ul>
        

        
        

        <li>
          <p><a href="https://www.mozilla.org/en-US/security/known-vulnerabilities/thunderbird/#thunderbird140.7.1">Security fixes</a></p>
          
        </li>
      
    
    </ul>
  
  

<p>As always, you’re encouraged to <a href="https://connect.mozilla.org/t5/ideas/idb-p/ideas/label-name/thunderbird">tell us what you think</a>, <a href="https://support.mozilla.org/questions/new/thunderbird">ask for help</a>, or <a href="https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird">file a bug in Bugzilla</a></p>
<style> li p { display: inline; } </style>
      ]]>
    </content>
  </entry>
  
  <entry>
    <id>https://www.thunderbird.net/en-US/thunderbird/140.7.0esr/releasenotes/</id>
    <title type="html">Thunderbird 140.7.0esr</title>
    <author>
      <name>Thunderbird</name>
      <uri>https://www.thunderbird.net</uri>
    </author>
    <link rel="alternate" type="text/html" href="https://www.thunderbird.net/en-US/thunderbird/140.7.0esr/releasenotes/"/>
    <updated>2026-01-13T00:00:00+00:00</updated>
    <published>2026-01-13T00:00:00+00:00</published>

    <content type="html"><![CDATA[
      

  
  

  
    

    
      
        
        

        
          <h3>Fixed</h3>
        

        
        
          <ul>
        

        
        

        <li>
          <p>Thunderbird could crash</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p><a href="https://www.mozilla.org/en-US/security/known-vulnerabilities/thunderbird/#thunderbird140.7">Security fixes</a></p>
          
        </li>
      
    
    </ul>
  
  

<p>As always, you’re encouraged to <a href="https://connect.mozilla.org/t5/ideas/idb-p/ideas/label-name/thunderbird">tell us what you think</a>, <a href="https://support.mozilla.org/questions/new/thunderbird">ask for help</a>, or <a href="https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird">file a bug in Bugzilla</a></p>
<style> li p { display: inline; } </style>
      ]]>
    </content>
  </entry>
  
  <entry>
    <id>https://www.thunderbird.net/en-US/thunderbird/147.0/releasenotes/</id>
    <title type="html">Thunderbird 147.0</title>
    <author>
      <name>Thunderbird</name>
      <uri>https://www.thunderbird.net</uri>
    </author>
    <link rel="alternate" type="text/html" href="https://www.thunderbird.net/en-US/thunderbird/147.0/releasenotes/"/>
    <updated>2026-01-13T00:00:00+00:00</updated>
    <published>2026-01-13T00:00:00+00:00</published>

    <content type="html"><![CDATA[
      

  
  

  
    

    
      
        
        

        
          <h3>What’s New</h3>
        

        
        
          <ul>
        

        
        

        <li>
          <p>Add "Show Full Path" folder pane option for compact view modes</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Add `mail.useLocalizedFolderNames' to toggle special folder name localization</p>
          
        </li>
      
    
      
        
        
          </ul>
        

        
          <h3>Changed</h3>
        

        
        
          <ul>
        

        
        

        <li>
          <p>Special folders are now localized based on a restricted set of names</p>
          
        </li>
      
    
      
        
        
          </ul>
        

        
          <h3>Fixed</h3>
        

        
        
          <ul>
        

        
        

        <li>
          <p>Selected status and priority was not displayed in search widgets</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Compacting multiple folders failed and did not compact</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Resetting manual folder sorting did not work for sub folders</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Unified archive subfolders could show wrong names and no messages</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Folders with deep hierarchy and long folder names could fail to display</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Moving saved search/virtual folder under IMAP could fail</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>"Open and Show" for OpenPGP-signed message (.eml) did not work</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>"Search Messages" search did not finish due to unparsable local folders</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Compose command line flag no longer worked correctly</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Search for "Attachment" in Settings menu did not find "Files and Attachments"</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Account Hub did not show error message on failure when creating OAuth2 EWS account</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Thunderbird could crash during exchange address account setup</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Japanese locale users could not create message filters</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Moving virtual folder within maildir based IMAP or local folder could fail</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Thunderbird could crash when marking all messages as read</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Startup could be slow with large number of folders not using subscriptions</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>EWS message send that required a password errored instead of prompting</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>EWS HTTP 500 backoff errors were not handled gracefully</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>SMTP sending could hang when when multiple messages queued for sending</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Thunderbird could crash when emptying EWS trash</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Broken feed icon could prevent updating of feeds</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Calendar did not alert user for connection issues</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Creation of tasks with Start or Due date was not possible</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p>Visual and UX improvements</p>
          
        </li>
      
    
      
        
        

        

        
        

        
        

        <li>
          <p><a href="https://www.mozilla.org/en-US/security/known-vulnerabilities/thunderbird/#thunderbird147">Security fixes</a></p>
          
        </li>
      
    
    </ul>
  
  

<p>As always, you’re encouraged to <a href="https://connect.mozilla.org/t5/ideas/idb-p/ideas/label-name/thunderbird">tell us what you think</a>, <a href="https://support.mozilla.org/questions/new/thunderbird">ask for help</a>, or <a href="https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird">file a bug in Bugzilla</a></p>
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      ]]>
    </content>
  </entry>
  
</feed>