I see you are on the Starka server, i pinged your website in cmd and here are the results:
Microsoft Windows [Version 6.0.6001]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.
C:\Windows\system32>ping gosun.co.cc
Pinging gosun.co.cc [69.175.120.122] with 32 bytes of data:
Reply from 69.175.120.122: bytes=32 time=112ms TTL=55
Reply from 69.175.120.122: bytes=32 time=115ms TTL=55
Reply from 69.175.120.122: bytes=32 time=111ms TTL=55
Reply from 69.175.120.122: bytes=32 time=124ms TTL=55
Ping statistics for 69.175.120.122:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 111ms, Maximum = 124ms, Average = 115ms
C:\Windows\system32>
I see no speed lack on your website with firefox, i am also in the worst internet speed area (Zambia, Africa). With a 2MB Broadband connection (200KB/s downloads)!
However i do agree that the ping at the start can be slow but afterwards the speed is fast, it depends on your connection