Back to the topic, how's it compared to firefox?
See
http://mindprod.com/jgloss/opera.html
Opera is my favourite browser. The main reason I like it is that I
click start, and instantly it is up and has a page displayed. All the
other browsers take forever by comparison to load.
It is highly configurable. I can get every panel and button just the
way I want it. And the ini files are easy to manipulate with at text
editor.
I has a feature to fill in forms. This is not such a novelty, but it
originally was.
It is clever about downloads. It starts right away, even before you
have got the name of the save file typed, so often the download is
ready by the time you have selected it.
I can label files with 4NT describe during download. Other browsers
don't make them visible until the download is over.
Like firefox it has fun skins.
I keep testing my stuff in a number of browsers:
Opera, Netscape, Mozilla, Firefox, and IE, but the one I keep falling
back on is Opera. I use IE for banking because the website is set up
only to work with that one browser. Other than that, I use Opera for
everything else.
All those browsers use the Sun Java and all automatically switch to
the most recently installed Java without fuss.