Is it normal for Firefox to listen on two random TCP ports every time?
Here's what happens ...
Bringing Firefox 3.6.2 freeware up (set by default to a blank page for this test) on WinXP SP3 with Comodo Internet Security 3.14 firewall freeware reporting Firefox begins "listening" on TCP port 1570 and 1572.
Closing & opening Firefox again (on a blank page by default), now Firefox is listening on TCP ports 1577 and 1579.
Closing & reopening, Comodo reports Firefox begins listening on TCP ports
1599 and 1601. Repeating, it's listening on ports 1643 and 1645. Then 1647 and 1649. Then 1651 and 1653. Then 1680 & 1682. Then 1689 & 1691.Debugging, I bring up IE 8.0 on a blank page, yet I don't see any ports opened for listening; so it's just Firefox related.
The Firefox Tools->Add-Ons are all set to disable for this test (Adblock Plus 1.1.3 freeware, Flash Video Resources Downloader 1.0.3 freeware, Flashblock 1.5.11.2 freeware, Java Console 6.0.18 freeware, Java Quick Starter 1.0 freeware, Microsoft .NET Framework Assistant 0.0.0 freeware).
Two questions: Does Firefox open two random ports for listening when you start it on a blank page?
If not, do you have any suggestions for debugging what these ports are doing?