Opera 25 stable is now available for download.What’s new in this release?
Web notifications – native alerts or status information to their users.
A PDF viewer.
An experimental start page including new stylistic treatments for Speed Dial entries and the Discover feature.
Enhanced support for Chromium extensions.
Memory and loading improvements for the start page.
Fixes and enhancements for how Opera handles HiDPI video and MP3 audio.
Network installation for Mac.
Enhancement for the Opera tile icon on Windows 8.