Opera 43 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 2017-02-07 for public access and a brief summary of important updates and change log pertaining to this edition can be read below.

Opera 43 has been built on Chromium 56 rendering engine and has taken yet another milestone in adding important optimization technique of Instant page loading, Profile Guided Optimization (PGO)  and classic link selection.

Instant page loading technology intelligently predicts before the user completes the keying and start loading the website in back round. As a result the webpage is displayed to the user in a flash before he or she completes the keying. 

Profile Guided Optimization modifies the browser resources based on individuals browsing and most used components. Another functionality addition in this release is Classic link selection which allows users to select the text in the link without triggering the url.