Mozilla Firefox - the browser is very fast, and speed of apparent not only during loading web pages, but when looking at bookmarks and history. Made it through the engine, and Mozilla allows you to view all Web pages in one window mnogovkladochnom, but also has many other useful options, including the ability to significantly enhance connectivity plug-ins (and released them a great many).

Mozilla Firefox is focused on improved memory handling, performance, and stability, improved XUL, and new core components such as application data stored in SQLite. Mozilla Firefox could break a few existing extensions and applications built on top of Firefox, and it will definitely include new optimizations if you like to build on the popular browser. Mozilla Firefox should have additional javascript and SVG features if you're into that sort of thing. 
 
Features of Mozilla Firefox 4.0:
• Library
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. You can also save your frequent searches in dynamic smart folders that automatically update as your bookmark list and history grow.
• Tags
Label a site with names or categories that are meaningful to you. For example, you can label the site www.bbc.co.uk with the “news” tag as well as the “foreign investments” tag, plus give www.nytimes.com the “news” tag, too. When you enter “news” into the location bar, both sites will be shown as results. A single site can have multiple tags, and there’s no limit to the number of tags you can create. You may not remember the exact name of a site, but with a tag, you’ll be able to find it in a way that makes sense to you.
• Smart Location Bar
A quick way to get to the sites you love—even the ones with addresses you only vaguely remember. The new Firefox 3 location bar learns as you use it—it’s so highly evolved that we like to call it the “Awesome Bar”. Over time, it adapts to your preferences and offers better fitting matches. Type in a term and the autocomplete function includes possible matching sites from your browsing history, as well as sites you’ve bookmarked and tagged in a drop down. For example, you could enter the tag: “investments” to find “www.fool.com”. Matched terms are highlighted, making the list of results easy to scan.
• One-Click Bookmarking
Manage your bookmarks a lot or a little. One click on the star icon at the end of the location bar bookmarks a site. Two clicks and you can choose where to save it and whether to tag it. File bookmarked sites in easy-to-access folders and organize according to theme (like “job search” or “favorite shopping”). Find your bookmarked sites in a flash by entering the tag, page or bookmark name into the location bar. The more you use your tags and bookmark names in the location bar, the more the system will adapt to your preferences.
• Smart Bookmark Folders
These dynamic folders give you easy access to your favorite sites and can be placed in your Bookmarks menu or Bookmarks toolbar. We’ve included some for you as defaults, including one that shows you the sites you visit most frequently (create your own by saving your searches in the Library).

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