Opera's badge system includes a smart tweak: quick links for reporting a site as fraud or malware.
New feature Tab Stack, groups tabs only in the tab bar.
Doesn't make great strides in its HTML5 compliance
Opera remains a closed-source and niche approach to browsing that lacks the open-source appeal of Firefox or the corporate backing of Chrome, Safari, or Internet Explorer
The best browser for HTML5
New search feature, Instant, that tries to predict just what you're looking for.
Less people use it
Not very fast
Safari Reader feature
Smoother transitions, smoother video performance and all around a faster experience.
Takes longer to install than the other competitors.
Memory usage goes up when loading a page with several links.
The ability to group different pages into collections making it easy to switch between them.(Panorama feature)
The best browser for add-ons.
By making itself so versatile it also became more slow.
Does not let all facebook functions work. Slow loading web pages.
It is currently the best browser for speed on the PC.
New "do not track" feature.
One of the biggest cons of IE9 is the fact that this version of the web browser only supports Windows 7 and Vista.
People who use Windows XP as their computers' operating system won't be able to use Internet Explorer 9.