It's not 31mb for a single song

It does not work.

Anyway I would never install it in my main browser, because its code is secret and it can see all my passwords and other things that I write.

See:

https://support.mozilla.org/en-US/kb/permission-request-messages-firefox-extensions#w_access-your-data-for-all-websites

"The extension can read the content of any web page you visit as well as data you enter into those web pages, such as usernames and passwords."

This extension will place a donate button on every YouTube page that just says "Donate". The donate button leads to an obscure patreon page. I thought my computer was infected with malware.

Trash, is a front for a separate converter that throttles down to uselessness after 3 conversions.

Used to be good. Not anymore

"now it wants you to install malware"
screenshot:
http://ipic.su/img/img7/fs/YouTubevideoconvertertoMP3.1567194881.png

last update killed it - now it wants you to install malware

Doesn't work. All I get is "Status: Error - Contains Copyrighted Material" :( :(

broken, complicated