Google Toolbar often distributed through product bundling with a primary download. Google Sidewiki was launched on September 23, 2009, allowing users to make comments, which are visible to the public, on any web page. Google uses ranking algorithms to determine comment relevancy and usefulness using criteria such as users voting up and down a comment and past contributions. Sidewiki is currently available for Internet Explorer and Firefox through Google Toolbar, the Google Chrome browser through an add-on, and for other browsers, like Safari, it is available as a bookmarklet. Web site owners cannot control Sidewiki comments, and there is currently no way
Features of the Opera web browser would otherwise have issues to run on Opera and to cloak the UA string by default for some website domains. Features of the Opera web browser This article details features of the Opera web browser. This section describes the features currently available in Opera. In Opera 49, developers added a snapshot tool with editing features. Opera is the first web browser to provide support for 360-degree videos to be played directly into virtual reality headsets. Opera offers full page zooming. Instead of just making the text bigger, this feature expands all page elements, including text, images, videos, and other content