Mozilla Firefox is the most popular web browser out there. Firefox features include tabbed browsing, a spell checker, incremental find, live bookmarking, a download manager, and an integrated search system that uses the user's desired search engine (Google by default in most localizations). Functions can be added through add-ons, created by third-party developers, of which there is a wide selection, a fact which has attracted many of Firefox's users. A redesigned page rendering and layout engine means you see Web pages faster—and in the way they were meant to be seen. Firefox has the most ways to customize your online experience specifically for the way you use the web. There are more than 5,000 Add-ons (little extras that augment Firefox to meet your unique needs) just waiting out there to help you do more, have more fun and be more creative online. Banish pop-ups (and pop-under windows) from your surfing experience once and for all. Or, find a happy medium—choose to view blocked pop-ups or create an “allow” list of sites whose pop-ups you’re okay with seeing. Make your browser as efficient as you can imagine. Your browsing history (all the websites you’ve seen) and your bookmarks (all the websites you’ve saved) are archived in the Library, where they can be easily searched and organized.