Updated firefox packages has been released for Ubuntu Linux 16.04 LTS, 18.04 LTS, and 19.04

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Ubuntu Security Notice USN-4140-1
September 25, 2019

firefox vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Firefox could be made to hijack the mouse pointer it if opened a malicious
website.

Software Description:
- firefox: Mozilla Open Source web browser

Details:

It was discovered that no user notification was given when pointer lock is
enabled. If a user were tricked in to opening a specially crafted website,
an attacker could potentially exploit this to hijack the mouse pointer and
confuse users.

Update instructions:

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

Ubuntu 19.04:
firefox 69.0.1+build1-0ubuntu0.19.04.1

Ubuntu 18.04 LTS:
firefox 69.0.1+build1-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
firefox 69.0.1+build1-0ubuntu0.16.04.1

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

References:
https://usn.ubuntu.com/4140-1
CVE-2019-11754

Package Information:

https://launchpad.net/ubuntu/+source/firefox/69.0.1+build1-0ubuntu0.19.04.1

https://launchpad.net/ubuntu/+source/firefox/69.0.1+build1-0ubuntu0.18.04.1

https://launchpad.net/ubuntu/+source/firefox/69.0.1+build1-0ubuntu0.16.04.1

  Firefox Security Update for Ubuntu