“Subscription Trap” Websites

“Subscription trap” websites prey on users who are trying to download legitimate free software. These sites trick users into paying for expensive subscriptions for otherwise free software. Some even go … Read more

7 Tips for Fuzzing Firefox More Effectively

In the past half year I learned quite a lot about the different fuzzing approaches that security researchers and contributors use on Firefox. Although information on the subject should be … Read more

Speeding Up Security Reviews

At Mozilla we have a strong commitment to security; unfortunately due to the volume of work underway at Mozilla we sometimes have a bit of a backlog in getting security … Read more

Why an outdated Java Plugin is so serious

Recently, Mozilla responded to an imminent threat to Firefox users who have an outdated Java plugin installed: Vulnerable versions of the plugin were blocked automatically (see blog post). Since then, … Read more

Blocklisting Older Versions of Java

Mozilla recently implemented a block for older versions of Java (Version 6 Update 30 and below as well as Version 7 Update 2 and below) which are vulnerable to a … Read more

Update on Address Sanitizer

In a previous blog post, I outlined how the memory error detection tool Address Sanitizier (ASan) can be used with Firefox to find memory problems with a high degree of … Read more