Īmong the new features introduced in version 9.1 (released in 2006) was fraud protection using technology from GeoTrust, a digital certificate provider, and PhishTank, an organization that tracks known phishing web sites. With version 8.5 (released in 2005) the advertisements were completely removed and the primary financial support for the browser came through revenue from Google (which is by contract Opera's default search engine). Later versions of Opera gave the user the choice of seeing banner ads or targeted text advertisements from Google. Instead, Opera became ad-sponsored, displaying advertisements to users who had not paid for it. Version 5.0 (released in 2000) saw the end of this requirement. Up to this point, Opera was trialware and had to be purchased after the trial period ended. Opera 4.0, released in 2000, included a new cross-platform core that facilitated the creation of editions of Opera for multiple operating systems and platforms. Opera began development of its first browser for mobile device platforms in 1998.

Opera was initially released on Apand was first publicly released in 1996 with version 2.10, which ran on Microsoft Windows 95.

In 1994, Jon Stephenson von Tetzchner and Geir Ivarsøy started developing the Opera web browser while working at Telenor, a Norwegian telecommunications company.

Main article: History of the Opera web browser The company released a gaming-oriented version of the browser called Opera GX in 2019. Additionally, Opera users have access to a news app based on an AI-platform, Opera News. There are also mobile versions called Opera Mobile and Opera Mini. The web browser can be used on Microsoft Windows, Android, iOS, macOS, and Linux operating systems. In 2013, Opera switched from the Presto engine to Chromium. It was a commercial software for the first ten years and had its own proprietary Presto layout engine. Opera was initially released on April 10, 1995, making it one of the oldest desktop web browsers still actively developed today. It distinguishes itself from other browsers through its user interface and other features. Opera is nowadays a Chromium-based browser. Opera is a multi-platform web browser developed by its namesake company Opera. (Formerly FreeBSD, Nintendo Wii, and Nintendo DSi) Opera 82 displaying the Wikipedia main page on Windows 11

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