Try this Addon to Block Downloads

• https://addons.mozilla.org/en-US/firefox/addon/public-fox/

Thank you for your response bro but the problem is not solved.

Go to the Mozilla Add-ons Web Page {web link} (There’s a lot of good stuff here) and search for what you want.

If your provider has a time where you are not charged, there are add-ons that can delay downloading until that time.

Niroskutty, what ISP do you have as there is a Extension called Net Usage that you could look at.

http://netusage.iau5.com/ Support thread for this Extension is at http://forums.whirlpool.net.au/forum-replies.cfm?t=1240180&p=-1&#bottom

It is at https://addons.mozilla.org/en-US/firefox/addon/net-usage-item/ however it is a older version.