IceWeasel/ Firefox has a bottle neck.
To speed it up.....
Open your Firefox and type about:config at URL address bar and hit enter.
Again in the URL field Search for each..
To make a False into True, select the line to change, and double click or Right click and choose Toogle. On the 2nd option change, right click and select Modify
- network.http.pipelining > Make it True
- network.http.pipelining.maxrequests > Make it 8 or 10
- network.http.proxy.pipelining > Make it True
- network.dns.disableIPv6 > Make it True