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Mozilla Security Blog
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Latest posts
Last updated 4 months ago
Behind the Scenes: Fixing an In-the-Wild Firefox Exploit
4 months ago
At Mozilla, browser security is a critical mission, and part of that...
Firefox will upgrade more Mixed Content in Version 127
8 months ago
Most of the web already supports HTTPS: In fact, 93% of requests...
Rapidly Leveling up Firefox Security
10 months ago
At Mozilla, we believe in an open web that is safe to...
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
about 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
about 3 years ago
In keeping with our commitment to the security and privacy of individuals...
Securing the proxy API for Firefox add-ons
over 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
over 3 years ago
We are happy to announce that the Firefox 93 release brings two...
Firefox 93 protects against Insecure Downloads
over 3 years ago
Downloading files on your device still exposes a major security risk and...
Securing Connections: Disabling 3DES in Firefox 93
over 3 years ago
As part of our continuing work to ensure that Firefox provides secure...
Mozilla VPN Security Audit
over 3 years ago
To provide transparency into our ongoing efforts to protect your privacy and...