I've been using their DSL for over a year now. The issue you mention seems to come and go with me. Somewhere in their "very fine print" they state something to the affect of: Verizon DSL does not allow "always on" like cable does. ie: the browser does tend to go offline rather soon.
I dont have the "after 5 minutes" issue very often but it does happen sometimes. Im online mostly late at night as I work nights and do seem to have much better luck during these late hours as compared to normal daytime hours.
Oddly, I find when im running my weather program in the background (which is set to refresh every minute) I dont get that problem at all.
At other times I find I need to refresh more often to keep my browser connection awake with Verizon DSL. Even if it disconnects all I have to do is refresh and it pops right back on. An annoyance I've learned to become accustomed to. On realy rare occasions I need to reboot both the ADSL modem and the computer to get back online!
Welcome to Verizon!
Dell system running winxp
I connect using verizon dsl. If I am away from my computer for about an hour and one half I am unable to browse. I get a message that says "This page cannot be displayed. If I turn my modem off for 15 seconds then turn it back on I can surf but if I stop for more than 5 minutes it won't let me surf. Strangely my e-mail continues to work. Just can't browse wit IE. Spent more than an hour with Verizon Tech with no conclusion. Is there a setting in IE that might be causing this?