Mozilla Firefox Version 91.0.1 Released With Security Update

 Mozilla sent Firefox Version 91.0.1 to the release channel with one security update rated high in severity.

High#

• CVE-2021-29991: Header Splitting possible with HTTP/3 Responses

Fixed

• Fixed an issue causing buttons on the tab bar to be resized when loading certain websites (bug 1704404)
• Fixed an issue which caused tabs from private windows to be visible in non-private windows when viewing switch-to-tab results in the address bar panel (bug 1720369)
  

Update 

To get the update now, select "Help" from the Firefox menu, then pick "About Firefox."  Mac users need to select "About Firefox" from the Firefox menu. If you do not use the English language version, Fully Localized Versions are available for download.

References

• Security Updates
• Release Notes
• Rapid Release Calendar
  
  

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