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I upgraded to Chrome 61.0.3163 via ppa on Ubuntu 16.04 but it won't launch because NSS out of date. Launching Chrome in terminal gives:

NSS >= 3.26 is required. Please upgrade to the latest NSS, and if you still get this error, contact your distribution maintainer.

Running 

sudo apt-get install libnss3

gives

libnss3 is already the newest version (2:3.21-1ubuntu4)

Should I try to get a newer version of libnss that's not in the repository? I downgraded my version of Chrome for now.

Edit:

apt-cache policy libnss3
libnss3:
  Installed: 2:3.21-1ubuntu4
  Candidate: 2:3.21-1ubuntu4
  Version table:
 *** 2:3.21-1ubuntu4 500
        500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

cat /etc/apt/sources.list
# deb cdrom:[Ubuntu 16.04 LTS _Xenial Xerus_ - Release amd64 (20160420.1)]/ xenial main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://us.archive.ubuntu.com/ubuntu/ xenial main restricted
# deb-src http://us.archive.ubuntu.com/ubuntu/ xenial main restricted

## Major bug fix updates produced after the final release of the
## distribution.
# deb-src http://us.archive.ubuntu.com/ubuntu/ xenial-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## universe WILL NOT receive any review or updates from the Ubuntu security
## team.
deb http://us.archive.ubuntu.com/ubuntu/ xenial universe
# deb-src http://us.archive.ubuntu.com/ubuntu/ xenial universe
# deb-src http://us.archive.ubuntu.com/ubuntu/ xenial-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://us.archive.ubuntu.com/ubuntu/ xenial multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ xenial multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ xenial-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
# deb-src http://us.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
deb http://archive.canonical.com/ubuntu xenial partner
deb-src http://archive.canonical.com/ubuntu xenial partner

# deb-src http://security.ubuntu.com/ubuntu xenial-security main restricted
# deb-src http://security.ubuntu.com/ubuntu xenial-security universe
# deb-src http://security.ubuntu.com/ubuntu xenial-security multiverse
Például
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    What do you mean "Chrome PPA"? There's no official Chrome PPA that I'm aware of, other than Google's primary repository they use for distributing their software. – Thomas Ward Sep 07 '17 at 03:00
  • I meant the Google repository: https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb – Például Sep 07 '17 at 03:53
  • Downloading directly from the website gives the same version, same problem. – Például Sep 07 '17 at 03:54
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    Do me a favor, run sudo apt-get update, then attach the output of apt-cache policy libnss3 to your question as an edit. Also include the contents of your /etc/apt/sources.list file, please. My guess is you do not have the xenial-security or xenial-updates repository enabled and then your software on your computer updated to latest versions properly, as the latest libnss3 actually available for Xenial is 3.28, in the xenial-security and xenial-updates repository. – Thomas Ward Sep 07 '17 at 03:56
  • @ThomasWard you're right, neither -security nor -updates is enabled for anything. – muru Sep 07 '17 at 04:59
  • @ThomasWard Yes. You are right. Why is everything commented out? It might have been this way since I installed it. – Például Sep 07 '17 at 05:04
  • I am having the same issue using Ubuntu 15.10. But in my list i have wily-security and wily-updates but they are not commented. Any help ? – cosmincalistru Sep 11 '17 at 13:32
  • @cosmincalistru Your problem is different. You are using an Ubuntu release that is no longer supported. See How to install software or upgrade from an old unsupported release? and EOLUpgrades. Ubuntu 15.10 Wily Werewolf is end-of-life and its repositories have been moved over to the old-releases server. Please upgrade. It is dangerous to keep using EoL releases, because they no longer receive updates for security vulnerabilities. – Eliah Kagan Sep 13 '17 at 05:37

2 Answers2

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Your computer is not running with the xenial-updates or xenial-security repositories enabled.

Enable the repositories (uncomment the lines for those repositories), and then run sudo apt-get update and sudo apt-get dist-upgrade and upgrade all your packages to the latest package versions.

Thomas Ward
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4

Your version of libnss3 seems to be broken or missing. Try reinstalling it

sudo apt-get install --reinstall libnss3
vipee
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  • Only works if they enable xenial-updates or xenial-security because it needs a newer version than libnss3 that was in Xenial's standard repos (and that repo never gets updates, it's -updates and -security which contain the updates and updated libnss3, and those're usually critically-needed repos) – Thomas Ward Apr 04 '18 at 18:14