Opera 32.0.1899.0 has been promoted to the Developer channel.
The new Opera 32 Dev (Opera 32.0.1899.0) brings a fresh user interface, support for animated themes, a feature for synchronizing passwords across devices, among others.
For more information, read the changelog for yourself.
Installation instructions:
To install and test Opera Dev on Ubuntu 15.04 Vivid Vervet, Ubuntu 14.10 Utopic Unicorn, Ubuntu 14.04 Trusty Tahr and derivative systems, like: Linux Mint 17.1 Rebecca, Pinguy OS 14.04, Elementary OS 0.3, Deepin 2014, Peppermint Five, LXLE 14.04 and Linux Lite 2, you need to download the deb package and install it via command-line.
How to install Opera Dev on 32 bit Ubuntu and derivatives:
$ sudo apt-get install libnotify-bin gdebi
$ wget http://get.geo.opera.com/pub/opera-developer/32.0.1899.0/linux/opera-developer_32.0.1899.0_i386.deb -O opera-dev_i386.deb
$ sudo gdebi opera-dev_i386.deb
How to install Opera Dev on 64 bit Ubuntu and derivatives:
$ sudo apt-get install libnotify-bin gdebi
$ wget http://get.geo.opera.com/pub/opera-developer/32.0.1899.0/linux/opera-developer_32.0.1899.0_amd64.deb -O opera-dev_amd64.deb
$ sudo gdebi opera-dev_amd64.deb
Because the Opera deb package gets updated frequently, download the deb for amd64 Ubuntu systems from HERE and install it via gdebi.
Optional, to remove opera-developer, do:
$ sudo apt-get remove opera-developer