MFSA2025-59: Security Vulnerabilities fixed in Firefox ESR 140.1
Published Jul 22, 2025
·Updated
Security Vulnerabilities fixed in Firefox ESR 140.1
Affected Software
1 affected componentFixes available
Mozilla Firefox ESR<140.1
140.1
Event History
Jul 22, 2025
Advisory Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
Child vulnerabilities
Contains the following vulnerabilities.
Frequently Asked Questions
1
What security vulnerabilities are addressed in MFSA2025-59?
MFSA2025-59 addresses multiple security vulnerabilities in Mozilla Firefox ESR version 140.1.
2
What is the severity of MFSA2025-59?
The severity of the vulnerabilities fixed in MFSA2025-59 can vary, but they all pose potential risks to the security of Firefox ESR users.
3
How do I fix MFSA2025-59?
To fix MFSA2025-59, update your Mozilla Firefox ESR to version 140.1 or later.
4
Which versions of Firefox ESR are affected by MFSA2025-59?
All versions of Mozilla Firefox ESR prior to 140.1 are affected by the vulnerabilities in MFSA2025-59.
5
What should I do if I cannot update to Firefox ESR 140.1 due to compatibility issues?
If you cannot update to version 140.1, consider using an alternative browser or reviewing your usage of Firefox ESR until you can update.