Internet connection via Dial Up is getting extinct in many countries today but still in some part of the world people use limited bandwidth. If you are such a person and need to limit the bandwidth usage of your browser then here is a nice add-on to help you.
For Firefox Users

Those who use Firefox and looking forward to limit their browsing to an extent then simply install FireFox Throttle and start monitoring your browser's bandwidth.

For Internet Explorer Users

Interestingly the same plugin is available for I.E users which can be installed easily and perform the same functions as to monitor, control bandwidth usage of browser (or while browsing). Plugin is available as IE Throttle.

Download Plugins here.