Widgets aren't add-ons in the classic sense--they don't run within the browser itself. Instead, they're separate, stand-alone applications that run alongside your other software. This means that they stay open even when you close Opera, which can be useful, but they do little to extend the functionality of the browser.
Opera Mini is the leading browser on phones.
A little too minimalist.
If you have a slow computer, it'll be hard to load pages fast.
Able to use on all three operating systems.
Not many extensions nor plug-ins as firefox
Connection loss to page easily.
The Tab system is very easy to use.
Easy to use.
Lacking customization in tools/capabilities
Flash Block Ads
Strong security system
Certain websites won't work with firefox
Sometimes the browser and flash player will crash. You would have to restart your browser again
The security that's built in works better to block out virus' and spam
Flash and HTML5 performs a lot better than the other browsers.
Most targeted browser to infect peoples computers
Installation of programs downloads really slow.
Easiest browser to attain virus'
No plug-in downloads/apps.