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Opera is an 
internet browser that came along long before big hitters like Firefox and Chrome.
 
Overview
 Opera 12 keeps the general design and functionality of the highly-praised Opera 11, but adds convenient improved features like 
themes, 
web cam access and hardware acceleration. As for the the interface, Opera 12 features a slightly 
cleaner GUI  with a focus on webpages instead of buttons and menus. Overall, Opera  12 isn't a huge change compared to the last version, but it has been  improved with some nice new features.
 
Innovations and speed
 The big innovation in the last version of Opera was 
extensions  and while the choice of browser enhancements is still fairly limited,  when you install or uninstall add-ons, you don't have to restart your  browser. They are also sandboxed, so if one crashes, your browser won't.  Opera 12 runs just as quickly as 
Google Chrome  (the developer claims it's even faster) and the rendering engine has  been tweaked slightly to offer an even faster browsing experience.
 Visual Tabs and Tab Stacking is useful if you often have too many  open, and there are now visual mouse gestures. These are well  implemented, and accessed by holding the right mouse button which brings  up a translucent guide to mouse gestures. This is a great introduction  for people who've never used gestures, and hopefully allows for greater  use in the future.
  There's still an integrated mail client, which continues Opera's move  towards doing everything you need in one application. The newest  features or improvements of note are 
themes and 
web cam access.  The most notable improvement has been to Speed Dial which instead of  simply giving easy access to your favorite sites, now allows you to  embed your Speed Dial with dynamic information - in other words, web  apps within Opera. Meanwhile Password Syncing allows you to sync  passwords across machines and devices - just sign-up for an account and  Opera does the rest. There have also been some HTML5 improvements for  developers such as Session History, Navigation and the W3C File API.
 
Conclusions
 Opera 12 is a definite improvement on Opera 11 although the  changes aren't revolutionary. However, if you're looking for a new  browser, this is probably the most innovative currently on the market  and is well worth installing.
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