Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Since Mavericks installed Download Helper no longer works with YouTube

more options

Download helper now downloads empty files with no content, in both .flv and .mp4 formats.

Download helper now downloads empty files with no content, in both .flv and .mp4 formats.

All Replies (1)

more options

You can contact the Add-on manager for that.

Who creates these add-ons?

The add-ons listed here have been created by thousands of developers from our community, ranging from individual hobbyists to large corporations. All publicly listed add-ons are reviewed by a team of editors before being released.