I've been an Opera user for many, maybe 10 years or more. Now I decided to try Evernote and in Opera 12.16 it is not possible to run a web client of Evernote. Web Evernote window is blank. Even a plugin for Evernote Web Clipper says that it needs at least Opera version 16. So I decided to switch to Firefox.

Maybe formerly Opera was something extra, but now I found that when I download about 10 plugins, I have a browser that looks like and works like Opera or maybe better. Especially important for me is speed dial plugin Super Start and plugin QuickJava for switching javascript, flashes, etc on and off. Firefox Link is also available.

I exported Opera bookmarks with folders of bookmarks into html format and an import to Firefox was flawless.