Installed Chrome 61.0.3163.100-1 via ppa on Ubuntu 16.04 but it won't launch because NSS out of date

Question

After installation, launching via cli throws this error

[4394:4456:0926/124258.542217:FATAL:nss_util.cc(632)] NSS_VersionCheck("3.26") failed. NSS >= 3.26 is required. Please upgrade to the latest NSS, and if you still get this error, contact your distribution maintainer.

Policy details -

apt-cache policy libnss3

libnss3:
  Installed: 2:3.28.4-0ubuntu0.16.04.2
  Candidate: 2:3.28.4-0ubuntu0.16.04.2
  Version table:
 *** 2:3.28.4-0ubuntu0.16.04.2 500
        500 http://in.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages
        100 /var/lib/dpkg/status
     2:3.21-1ubuntu4 500
        500 http://in.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages

Source List -

cat /etc/apt/sources.list
# deb cdrom:[Ubuntu 14.04.1 LTS _Trusty Tahr_ - Release amd64 (20140722.2)]/ trusty main restricted

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

## Major bug fix updates produced after the final release of the
## distribution.

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://in.archive.ubuntu.com/ubuntu/ xenial universe
deb-src http://in.archive.ubuntu.com/ubuntu/ xenial 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://in.archive.ubuntu.com/ubuntu/ xenial multiverse
deb-src http://in.archive.ubuntu.com/ubuntu/ xenial 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 http://in.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://in.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 trusty partner
deb-src http://archive.canonical.com/ubuntu trusty partner

deb http://archive.ubuntu.com/ubuntu xenial main universe restricted multiverse
# deb-src http://archive.ubuntu.com/ubuntu xenial main universe restricted multiverse
deb http://in.archive.ubuntu.com/ubuntu/ xenial-updates multiverse universe restricted main
deb http://security.ubuntu.com/ubuntu/ xenial-security multiverse universe restricted main