Add Opera Browser PPA into Debian or Ubuntu

Setup key with:

wget -O - http://deb.opera.com/archive.key | sudo apt-key add -

Setup repository with:

sudo sh -c 'echo "deb http://deb.opera.com/opera-stable/ stable non-free" >> /etc/apt/sources.list.d/opera.list'

Setup package with:

sudo aptitude update sudo aptitude install opera-stable

or you can install one of these packages

Package: opera Version: 12.16.1860 Package: opera-next Version: 12.16.1860 Package: opera-stable Version: 43.0.2442.806 Package: opera-beta Version: 43.0.2442.686 Package: opera-developer Version: 44.0.2505.0