Every day, countless Mozillians spend numerous hours testing Firefox to ensure that Firefox users get a stable and secure product. However, no product is bug free and, despite all of our testing efforts, browsers still crash sometimes. When we investigate … Continue reading
To help prevent third party data leakage while browsing privately, Firefox Private Browsing Mode will remove path information from referrers sent to third parties starting in Firefox 59. Referrers can leak sensitive data When you click a link in your … Continue reading
Since Let’s Encrypt launched, secure contexts have become much more mature. We have witnessed the successful restriction of existing, as well as new features to secure contexts. The W3C TAG is about to drastically raise the bar to ship features … Continue reading
AES-GCM is a NIST standardised authenticated encryption algorithm (FIPS 800-38D). Since its standardisation in 2008 its usage increased to a point where it is the prevalent encryption used with TLS. With 88% it is by far the most widely used … Continue reading
Traditionally, software is produced in this way: write some code, maybe do some code review, run unit-tests, and then hope it is correct. Hard experience shows that it is very hard for programmers to write bug-free software. These bugs are … Continue reading
This is a short announcement for all security researchers working on Firefox that use our pre-built AddressSanitzer (ASan) builds. Until recently, you could download these ASan builds from our FTP servers. Due to changes to our internal build infrastructure, these … Continue reading
As part of our commitment to protect the privacy of our users, Mozilla will disable the insecure RC4 cipher in Firefox in late January 2016, beginning with Firefox 44. Mozilla will be taking this action in coordination with the Chrome … Continue reading
Yesterday morning, August 5, a Firefox user informed us that an advertisement on a news site in Russia was serving a Firefox exploit that searched for sensitive files and uploaded them to a server that appears to be in Ukraine. … Continue reading
The purpose of the HTTP Referer (sic) header is to help sites figure out where their traffic comes from. However, as the Web got more complex, the amount of information in the Referer header ballooned, leading to bigger privacy problems. … Continue reading
Issue A flaw in the Network Security Services (NSS) library used by Firefox and other products allows attackers to create forged RSA certificates. Mozilla has released updates to fix this vulnerability and you should apply these updates to ensure your … Continue reading
