User Feedback :: Speed DSL vs Windows

Just got the Fanless BareBonesMini-ITX,
512 MB Ram,
DSL on 128 DSL Pendrive for system,
myDSL on 512 SanDisk,
USB Aopen CD/DVD
Epson C86.

Wondering where in the system I can enter the info needed to get Sylpheed or Thunderbird to FireFox when I click on a URL in an email.

Tried the Mozilla site for preferences but got really snowed. I think it is in the system like KDE control panel in Mepis but not sure.

Would appreciate some help.  So impressed with DSL but really on the bottom edge of the learning curve  (Noob)
Thanks in advance.

Thanks for the help ... I think.

I did as you suggested and am faced with 'data overflow' in this 63 year old head.

I haven't a clue what to look for in all that information.

I set find for browser, then mail and default. Still to much info for a noobie.  Really thought there would be a default setting like in KDE control panel to set what the default browser and mail programs would be.  

Since everything else I have done is done on the command line or in Emelfm, I was looking in that area.

Could you please give me a clue of what and where I should be looking.

Thanks,
vince

Reading my last post, Its clear I don't know enough to even ask a question.

I have found that if I right click on the URL link to copy, I can then paste it to an open Firefox window and get where I want to go. That is sufficient.

I'm beginning to think that if you don't know linux, you just are setting yourself up for failure in DSL.  

I think that what I want the Mini-ITX box to do is basic.

provide Firefox, Thunderbird, Gaim and Skype.
Print out some basic letters and webpages.  Got that when I borrow my wifes USB printer.
Play my audio CD's occasionally, but most the time just boot off pendrive and go do the internet stuff.
Maybe later be able to watch DVD's.