Tar has, among others, the following options:
-v means verbose, -q means quiet = use these to regulate how much text appears on screen.
-c means make an archive, -x means extract = use only one of these
-z means zip/unzip the tar while compiling/decompiling an archive. Ie, if you use it with c it will compress the archive after making it, use it with x to unzip it before extracting.
Goodness knows what -f means but I use it anyway
So you do:
tar zxvf <file>
To unzip and extract a .tar.gz or .tgz file.
Or
tar xvf <file> to extract a .tar file.
As for browsers, I use mozilla or galeon. Check out the downloadable themes for mozilla, as some of them are pretty cool.
David