Computer Tricks Step 1:
Download this Add on from here:
install the add on.
Computer Tricks Step 2:
Now navigate to Tools->FlashGot->More Options
Tips step 3:
now you can see the Internet download manager is displayed in select list.
Just click the add button
That's all you are done. If you want to download the file. Just right click on the link and select FlashGotLink
Now it will show the IDM download options.
That's all enjoy..!!