Firejail – A Security Sandbox for Mozilla Firefox

Security – a growing problem ( even on Linux ) but this Firejail sandbox for Firefox might just come in handy!

l3net - a layer 3 networking blog

We often find ourselves running applications we received in binary format. These include not only traditional software installed on our computers, but also unauthenticated programs received over the network and run in web browsers. Most of the time these applications are too complex to be bug-free, or can come from an adversary trying to get access to our system.

Firejail is a SUID sandbox program that reduces the risk of security breaches by restricting the running environment of untrusted applications. The core technology behind Firejail is Linux Namespaces, a virtualization technology available in Linux kernel. It allows a process and all its descendants to have their own private view of the globally shared kernel resources, such as the network stack, process table, mount table, IPC space.

Introducing Firejail

The program is written in C and only needs libc and POSIX threads (libpthreads), available by default on any Linux platform. The

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