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Mozilla Security Blog
Get the latest updates from Mozilla Security Blog directly as they happen.
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Latest posts
Last updated 20 days ago
Behind the Scenes: Fixing an In-the-Wild Firefox Exploit
20 days ago
At Mozilla, browser security is a critical mission, and part of that...
Firefox will upgrade more Mixed Content in Version 127
5 months ago
Most of the web already supports HTTPS: In fact, 93% of requests...
Rapidly Leveling up Firefox Security
7 months ago
At Mozilla, we believe in an open web that is safe to...
Mozilla VPN Security Audit 2023
11 months ago
To provide transparency into our ongoing efforts to protect your privacy and...
Version 2.9 of the Mozilla Root Store Policy
about 1 year ago
Online security is constantly evolving, and thus we are excited to announce...
Updated GPG key for signing Firefox Releases
over 1 year ago
The GPG key used to sign the Firefox release manifests is expiring...
Upgrading Mozilla’s Root Store Policy to Version 2.8
over 2 years ago
In accordance with the Mozilla Manifesto, which emphasizes the open development of...
Revocation Reason Codes for TLS Server Certificates
over 2 years ago
In our continued efforts to improve the security of the web PKI...
Preventing secrets from leaking through Clipboard
almost 3 years ago
For decades users have been pressing Ctrl+C or relying on copy buttons...
Improving the Quality of Publicly Trusted Intermediate CA Certificates with Enhanced Oversight and Automation
almost 3 years ago
In keeping with our commitment to the security and privacy of individuals...
Securing the proxy API for Firefox add-ons
about 3 years ago
Overview Add-ons are a powerful way to extend and customize Firefox. At...
Firefox 93 features an improved SmartBlock and new Referrer Tracking Protections
about 3 years ago
We are happy to announce that the Firefox 93 release brings two...