Opera 25 is a web browser developed by Opera Software ASA, available for download in full install version for Windows platforms from legacy sources. This version of Opera was officially released on 2014-10-15 for public access and a brief summary of important updates and change log pertaining to this edition can be read below.

Opera 25 has been built on Chromium 38 rendering engine using JavaScript engine V8. This version is supported in Windows XP and later versions except Windows 10.

This version has many useful functionality improvements like PDF Viewer, Bookmark Manager, Web notifications, Start Page and API support Multimedia.

Now you can read the PDF files in the browser in the native mode without need for any extensions. However the inbuilt PDF viewer will be triggered only if any other PDF programs not installed in the OS. Now web developers can instantly popup messages and notifications to their users while browsing.  

Bookmark manager now has stylistic redesign which can help you organise your favorite websites including a tiny thumbnail of the website page. Speed dial and Discover features have got a beta version of the new design.

Now Opera supports the multimedia in much better way with enhancements, in addition to optimization of Start page memory usage and speed.