Why aren't my web browsers working properly?

[Tuhin]

Now see all computer programs stores some data on you computer,
and browser has to store a huge user data on machine,
so down the road you machine gets full of those app datas and which result in clogging the Browser!!
and this datas don't delete while in reinstall the software,

I suggest
Please reset all the browser you are using now
If you are using Windows 7 or Windows Vista :
For Chrome
Press Windows Key + R to bring up command prompt.

Enter " %LOCALAPPDATA%\Google\Chrome\User Data " without quotes and press enter..
You will find a "Default" folder .. Delete this folder and load chrome.
It will be reset to default settings.

For IE
Open Internet Explorer
Goto Internet Options of IE > Advance tab > Hit reset!!

For Mozilla
help->troubleshooting->reset firefox.

If still problem exist
grab a fresh and updated copy of browser and install them

Hope it helps , it usually works out for me