MFSA2021-01: Security Vulnerabilities fixed in Firefox 84.0.2, Firefox for Android 84.1.3, and Firefox ESR 78.6.1
Published Jan 6, 2021
·Updated
Security Vulnerabilities fixed in Firefox 84.0.2, Firefox for Android 84.1.3, and Firefox ESR 78.6.1
Affected Software
4 affected componentsFixes available
Mozilla Firefox<84.0.2
84.0.2
Mozilla Firefox ESR<78.6.1
78.6.1
All of the following
Mozilla Firefox=84.1.3
Google Android
Event History
Jan 6, 2021
Advisory Published
via Mozilla·12:00 AM
Frequently Asked Questions
1
What is the severity of MFSA2021-01?
MFSA2021-01 addresses several critical security vulnerabilities that could potentially lead to arbitrary code execution.
2
How do I fix MFSA2021-01?
You can fix MFSA2021-01 by updating to Firefox version 84.0.2, Firefox for Android version 84.1.3, or Firefox ESR version 78.6.1.
3
Which versions of Firefox are affected by MFSA2021-01?
Affected versions include Firefox versions up to 84.0.2 and Firefox ESR versions up to 78.6.1.
4
Is Firefox for Android affected by MFSA2021-01?
Yes, Firefox for Android versions up to 84.1.3 are affected by the vulnerabilities addressed in MFSA2021-01.
5
What should I do if I cannot update to the recommended versions for MFSA2021-01?
If you cannot update, consider using alternative browsers or implementing additional security measures until you can upgrade.