Cache: please limit the amount of disk your browsers uses on Unix machines (the default is too high, and will clog your quota). 

1. Firefox 

1.1 Menu Tools -> Options -> Network ->Cache

choose 0Mb in "Use up to" - and click on "Clear Cache" button 

1.2 Menu Tools -> Options -> Security -> Tell me if the site..." 

you have two choices: 

a. uncheck the box 

b. check "Check by asking Google ..." 

In both cases, you have to click "ΟΚ", then exit the panel from the menu bar File -> Exit.

2. Iceweasel 

Menu Preferences -> Advanced -> Network -> Cache: at "Use up to ..." choose 0 Mb. 

3. Konqueror 

Menu Settings -> Configure Konqueror -> Cache: uncheck the option "Use Cache". 

4. Explorer 

Menu Tools -> Internet Options -> General -> Browsing history -> Settings: at "Disk space to use" choose 0 Mb.

Speed  

1. Type "about:config" into the address bar and hit return. Scroll down and look for the following entries:

network.dns.disableIPv6

network.http.pipelining

network.http.proxy.pipelining

network.http.pipelining.maxrequests

2. Alter the entries as follows: 

network.dns.disableIPv6 -> true

network.http.pipelining -> true

network.http.proxy.pipelining -> true

network.http.pipelining.maxrequests -> 30

This means it will make 30 requests at once. Normally the browser will make one request to a web page at a time. When you enable pipelining it will make several at once, which really speeds up page loading. network.http.pipelining 

 3. Lastly right-click anywhere and select New-> Integer. Name it nglayout.initialpaint.delay and set its value to "0". This value is the amount of time the browser waits before it acts on information it receives.