As of 2015, some Web browsers that offer free downloads are Mozilla Firefox, Google Chrome and Opera. Mozilla Firefox lets users sync their information including browsing history, passwords and bookmarks across computers. Its voice interaction add-on lets users use voice commands to control their Firefox browsers.
Google Chrome supports tab browsing and allows users to sync their information including extensions and preferences across computers. It also lets users access the Internet via incognito mode and deletes all the cookies and passwords when they close their browsers. Opera supports tab-grouping and lets users stack related browser windows up vertically. It has a built-in email client that allows users to send emails within the browser.