Opera has a functionality called Turbo which increases browser's speed and reduces data consumption considerably by compressing the data that's found in a web page.

Opera's Speed Dial (new tab page) has the ability to hold as many websites as you want, and you can customize it almost however you want. You can also organize the websites on the Speed Dial into folders.

The built-In adblocker is faster than any extension. It's possible to add your own filter lists. However, the adblocker isn't enabled by default.

Even on slow connections, with Opera Turbo.

Opera is full of user controlled settings. Everything can be imported and exported, even RSS feeds. It can be skinned in a variety of different themes or it can be extended through the use of a large number of plugins available.

Opera Sync allows you to synchronize your bookmarks, passwords, and more from any computer, phone, or tablet.

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