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
Vivaldi (web browser) browser has 1 million users as of January 2017. Vivaldi began as a virtual community website that replaced My Opera, which was shut down by Opera Software in March 2014. Jon Stephenson von Tetzchner was angered by this decision because he believed that this community helped make the Opera web browser what it was. Tetzchner then launched the Vivaldi Community—a virtual community focused on providing registered users with a discussion forum, blogging service, and numerous other practical web services—to make up for My Opera's closure. Later, on January 27, 2015, Vivaldi Technologies launched—with the community in mind—the first technical preview