It's lightness and speed makes me feel much happier than using Firefox.I just printed with it! While the feature listing says it does not supports printing!(And that was about to make me give up on it before even testing it). The only real issue I've seen is 'Rarely incorrect font rendering', that is, in my mail site(chmail.ir) regular mail titles are incorrectly shown as bold, just equal to bold ones, while Firefox does not do that. @freddy92: You probably have an anti-virus that tries to scan encrypted(https) connections, like Kaspersky. These anti-viruses install something like a driver in the middle, catching all the connections. It's like a man-in-the-middle attack, but there's actually security job taking place.
Windows XP is old, and Microsoft no longer provides official support for the venerable operating system. That’s why the best option is to install Windows XP in a virtual machine so you can keep it on hand at all times. That’s why they supply Windows XP Mode, a full version of XP.
So to open all https sites, the browser would need the Kaspersky https certificate as well. These anti-viruses typically install their certificate for browsers automatically to enable them opening https sites, but probably not for browsers that are installed later. That is the case with Kaspersky(and probably some other anti-viruses). So you have to install anti-virus' certificate manually. You can find instructions for how to do this in your anti-virus program by searching of course.