The HTML rendering engine in Opera isn't secure. You appear to worry about that issue, so stay away. Also you won't be able to use those plugins
Safari has the same issues, and Chrome similar but different - though there is a NoScript plugin for Chrome
Also theres a privacy issue with Opera over the way searches are carried out and retained on their servers. Their browser service is very much "in the cloud" rather than on your PC
If its a secure e-mail client that you need, take a look at The Bat!
Its highly configurable - and more importantly by default blocks all scripts and images
You'd need third party spam filters, but thats easy enough to provide
As for Live Mail, its convenient - but it has issues. For instance when you try to send a photo attachment, instead by default it tries to load the image up to the web to your windows live account and then simply sends a link
Theres a workround, but its a kludge. Its OK for the hard of thinking, but for serious work its not really applicable. Thats why most of my customers use it......
Last edited by Milo Minderbinder; 18th May 2012 at 17:18.