History of the web browser is included in Windows 10, but Microsoft Edge became the default browser there. Apple's Safari, the default browser on Mac OS X from version 10.3 onwards, has grown to dominate browsing on Mac OS X. Browsers such as Firefox, Camino, Google Chrome, and OmniWeb are alternative browsers for Mac systems. OmniWeb and Google Chrome, like Safari, use the WebKit rendering engine (forked from KHTML), which is packaged by Apple as a framework for use by third-party applications. In August 2007, Apple also ported Safari for use on the Windows XP and Vista operating systems. Opera was first released in 1996.
Google Sidewiki Google Sidewiki Google Sidewiki was a web annotation tool from Google, launched in September 2009 and discontinued in December 2011. Sidewiki was a browser extension that allowed anyone logged into a Google Account to make and view comments about a given website in a sidebar. Despite the name, the tool was not a collaborative wiki, though the comments were editable by the author. Google used ranking algorithms to determine comment relevancy and usefulness, using criteria such as users voting up and down a comment, and past user contributions. Anyone could look up a contributor's Google profile and assess their credibility.