To find the correct solution to your problem, we require some more non-personal information from you. Please do the following:

• For Firefox versions previous to 29.0: Click the Firefox button at the top left, then click the Help menu and select Troubleshooting Information from the submenu. If you don't have a Firefox button, click the Help menu at the top and select Troubleshooting Information from the menu.
• For Firefox 29.0 and above: Click the menu button , click help and select Troubleshooting Information.

Now, a new tab containing your troubleshooting information should open.

• At the top of the page, you should see a button that says "Copy text to clipboard". Click it.
• Now, go back to your forum post and click inside the reply box. Press Ctrl+V to paste all the information you copied into the forum post.

If you need further information about the Troubleshooting information page, please read the article Use the Troubleshooting Information page to help fix Firefox issues.

Thanks in advance for your help!

I assume that you are referring to dowmloading the videos with the 1-Click YouTube Video Downloader extension.

You currently use the Firefox 31 beta version.

Does this also happen with the current Firefox 30.0 release or does it fail as well in that version?

• http://www.mozilla.org/en-US/firefox/all.html