In October 2016, Mozilla announced that, as of Firefox 51, we would stop validating new certificates chaining to the root certificates listed below that are owned by the companies WoSign … Read more
To provide transparency into our ongoing efforts to protect your privacy and security on the Internet, we are releasing a security audit of Firefox Accounts (FxA) that Cure53 conducted last … Read more
Prior to the release of the Mozilla Observatory a year ago, I ran a scan of the Alexa Top 1M websites. Despite being available for years, the usage rates of … Read more
Today we are announcing the relaunch of our web security bug bounty program, creating greater transparency into how we handle web security bug bounty payouts. History Bug bounty programs started … Read more
Mozilla has released version 2.4.1 of Mozilla’s CA Certificate Policy and sent a CA Communication to inform Certification Authorities (CAs) who have root certificates included in Mozilla’s program about new … Read more
Our deprecation plan for the SHA-1 algorithm in the public Web, first announced in 2015, is drawing to a close. Today a team of researchers from CWI Amsterdam and Google … Read more
Sharing the work we do around web and information security is an important role of Mozilla Security. We often get questions on specific security technologies, both from our engineers who … Read more
Securing modern web applications effectively is a complex process. However there are many straightforward security controls such as HTTP security headers which are very effective at blocking web common attacks. … Read more
HTTPS, the secure variant of the HTTP protocol, has long been a staple of the modern Web. It creates secure connections by providing authentication and encryption between a browser and … Read more
At roughly 1:30pm Pacific time on November 30th, Mozilla released an update to Firefox containing a fix for a vulnerability reported as being actively used to deanonymize Tor Browser users. … Read more
Before loading a URI, Firefox enforces numerous content security checks verifying that web content can not perform malicious actions. As a first line of defense for example, Firefox enforces the … Read more
Mozilla has discovered that a Certificate Authority (CA) called WoSign has had a number of technical and management failures. Most seriously, we discovered they were backdating SSL certificates in order … Read more