Opera 15 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 2013-07-02 for public access and a brief summary of important updates and change log pertaining to this edition can be read below.

Opera 15 has been built on Chromium 28 rendering engine using JavaScript engine V8. This version is supported in Windows XP and later versions except Windows 10.

Opera 15 was a major milestone in its release history as the developer decided to migrate from their  layout engine Presto to Chromium's WebKit layout engine. As it is big transition Opera has to be completely re-written for having compatibility with Chromium.

Opera's new features in this edition includes Combined Search & Address Bar, Enhanced Speed Dial, Stash, Discover and Off-Road Mode.  By combining address and search bar, opera can now much more efficiently predict what user expects from a search or entering website name.

Speed Dial has now can be customized to make entries into groups and a search function to filter. Stash is another great function addition which can create a snapshot of a webpage contains meta-data and geographic details.

With Discover feature, now news and content can be filtered through specific location and language. Off-Road mode already used in Opera Mobile has been adopted from this version for efficient rendering of webpages by a server-side compression technology.