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
Firefox now supports built-in public key pins, which means that a shortened list of acceptable certificate authorities (CAs) for participating sites is built into Firefox. In this first stage of pinning roll-out, protected domains include addons.mozilla.org and Twitter, to be … Continue reading
We are always looking for ways to help protect people better from the constant threat of malicious software. For years Firefox has utilized Google’s Safe Browsing phishing and malware protection to help keep you from accidentally visiting dangerous sites. This … Continue reading
Firefox developer builds (“Nightly“) are now using a new certificate verification library we’ve been working on for some time, and this code is on track to be released as part of Firefox 31 in July. As we’ve all been painfully reminded recently (Heartbleed, … Continue reading
To provide a better and safer experience on the Web, we have been working to move Firefox away from plugins. After much testing and iteration, we determined that Firefox would no longer activate most plugins by default and instead opted … Continue reading
Web developers need better tools to help them debug security issues. The Web Console, part of the Firefox Developer Tools, shows errors and warnings filtered into different categories. Firefox 23 adds a new category of messages to the Web Console: … Continue reading
