Step 2. Go to Add-ons page of your Firefox 12 web browser.
Step 3. Hit click on the gear button as shown in the picture given below. Then click on Install add-on from file…
Step 4. Now, choose the .XPI file that you downloaded by following step 1.
Step 5. Install Add-on now.
Step 6. If you follow all these steps sequencially, you may certainly have installed IDM CC Add-On for you firefox 12. Now just restart your Firefox browser. You are done.
Step 7. Just start downloading and enjoy. I hope no issue will further come to you.
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