Where Apps are Stored on My HDD (like "Program Files")?

[Albert Wagner]

Jason Moody wrote:
> I am really new to Linux. Ubuntu is the first Linux Distro I've ever
> used. My question is pertaining to Firefox. I'm trying to set it up so
> that when I subscribe to RSS Feeds it will use my reader. But it asks
> where the app is located. (like in Windows "Program Files") I Googled it
> and have been unable to get the answer. I believe it's /usr/lib but I'm
> just not finding it. I'm just wanting to know where the applications I
> install are being put on my hard-drive. Thanks for any replies.
> 
> 
You might also try Google Reader.  It runs fine in Firefox and has it's 
own subscription mechanism.