My introductory Slackware lesson is as follows:
After 4 install attempts on 2 computers (various problems) it works!
All appears fine, no error messages. PPP setup and logon seems OK,
bit no response seen from the browsers. After URL inserted, there is no
response, nor does the webpage show. No error messages are seen.
Closing either browser used, I see the following in the terminal window:

Gtk_warning : floating object finalized
call on g_object-unref() on object with only a floating reference,
not owned by anyone and must be removed with gtk_object_sink() after
normal reference is obtained with g_object_ref()

Any ideas if the problem it connected to this message or is
back in the PPP setup? Thanks to all.

I'd say the first thing to do is to confirm that your internet connection in fact does work, either via a ping or by using a non-GUI browser. Using www.yahoo.com for illustration purposes try either one of the following

1. Open a terminal session and enter: ping www.yahoo.com

You should get something like the following (press ctl-c to break)

64 octets from 66.94.230.34: icmp_seq=1 ttl=55 time=18.5 ms
64 octets from 66.94.230.34: icmp_seq=2 ttl=55 time=19.0 ms
64 octets from 66.94.230.34: icmp_seq=3 ttl=55 time=17.5 ms
64 octets from 66.94.230.34: icmp_seq=4 ttl=55 time=18.1 ms

2. Open a terminal session and enter: lynx www.yahoo.com

lynx is a purely text based browser, and you should get the main Yahoo home page, just without any graphics whatsoever.

If neither one works, then it's your connection, not the browser. I recognize that this post won't solve the problem, but hopefully it will at least allow you to narrow down the possible factors. Good luck with it -- J.W.