Hi,
On newer HFS 2.4 RC7 you can use diff template on root folder "/"
Right-click on root folder (house icon and slash), Properties, Diff template,
inside put this:
[^special:strings]
title=Home Computer
HFS=Home Computer
Then browser tab title "HFS" and served page "HTTP File Server" will become "Home Computer".
I didn't remember when the "^ template section prepend" was introduced, but likely not 2.4 rc2.
It's advised to update to 2.4 rc6 or rc7, since many problems (most of unicode and ddos protection) were fixed in them.
use a slightly-older/community template to avoid some rc7 template problem, if they annoyed you
For other template, after switching press F6 on HFS window, in the opened text editor find the title (typically "HFS" "HTTP File Server") you want to modify, change it/them and save the file.
Cheers~