USN-4278-2: Firefox vulnerabilities

26 February 2020

Firefox could be made to crash or run programs as your login if it opened a malicious website.



  • firefox - Mozilla Open Source web browser


USN-4278-1 fixed vulnerabilities in Firefox. This update provides the
corresponding update for Ubuntu 16.04 LTS.

Original advisory details:

Multiple security issues were discovered in Firefox. If a user were tricked
in to opening a specially crafted website, an attacker could potentially
exploit these to cause a denial of service, conduct cross-site scripting
(XSS) attacks, or execute arbitrary code.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.04

After a standard system update you need to restart Firefox to make
all the necessary changes.