converter mp3 code example
Example 1: youtube mp3 converter
You can use WebTools, it's an addon that gather the most useful and basic tools
such as a synonym dictionary, a dictionary, a translator, a youtube convertor,
a speedtest and many others (there are ten of them).
You can access them in two clics, without having to open a new tab
and without having to search for them !
-Chrome Link :
https://chrome.google.com/webstore/detail/webtools/ejnboneedfadhjddmbckhflmpnlcomge/
Firefox link : https://addons.mozilla.org/fr/firefox/addon/webtools/
Example 2: youtube to mp4
ytmp3.cc is the best by far