Version 3.0.0 does NOT work anymore since last update (of Mar 16, 2021). Sometimes things like that happened so you just have to download the previous version BUT the developer STUPIDLY REMOVED all previous ones in version history. It's why I'm giving 1 STAR ONLY.

***UPDATE*** Guys, instead use the extension called: "YouTube Video and Audio Downloader (WebEx) by feller". It works like a charm AND it's recommended by FireFox

完全没用，还各种按钮莫名其妙的广告什么的

Takes me to the download page which immediately goes to a blank page

Lame. All it does it paste the URL for you in a 3rd party downloader. Even then it doesn't work, the page flashes then disappears.

funktioniert nicht

The download page disappears within a second and if you do catch it, nothing happens. YouTube ma have broke all the download addons. Even the Pro version of easy Youtube Video download quit working.

This add-on is no longer functioning.

安裝後，會被防毒軟體判定有疑似不被需要的程式會安裝到電腦中，且不想使用要從Firefox移除此套件，會一直反覆又從背景自己安裝回來，移除多次都還是會被偷偷安裝回來，後來移除Cookie及瀏覽紀錄後，才沒有再被安裝回來，實在是有點強迫，另外下載youtube時還會帶到另一個網頁去才能下載，不像其他套件可以直接下載到電腦上，因此不推薦！

"A secure connection could not be established

An error occurred while connecting to the server "sarah56045832897551.googuu.xyz". The communication participant received a valid certificate, but access was denied.

Error code: SSL_ERROR_ACCESS_DENIED_ALERT"

indirmiyor. berbat

this is now very underhand,the link button takes you to :::https://loader.to/?link=https://www.youtube.com/watch?v=8Q7c3RGmD54&f=6&s=1&e=20&r=coconvert....
there is nothing about downloading any music or film etc just a installer for "loader" erc and another donate button etc but for someone else,like a daisychain of "apps" ....reporting this to firefox team as it now seems fake,plus the permissions are way out of order now.

Redirects you to a site to do the download ...

I don't understand ho to use it. It does nothing.