One of the must-have add-ons for Firefox! Greetings to the author for his great job!

nice add-on, very useful!!!

It's awesome and thank you for your continued efforts and work.

Awesome!!!

It makes the application work so much better!

Fresh needles for the addict

Very easy to use

i like it :-)

An amazing add-on, a lot of cool features are in this extension, makes using YouTube more convenient than ever. Thank you, the developer(s)

Very useful add-on with some really cool features.

Perfect! Does the job really well.

5 stars its good, nice idea..

Beste YouTube Add-on die ich kenne.
Danke!

An excellent Extension! Great features, easy to use. Does what it says. Who could ask for more? - Article_86

Nice! Like older firefox extension to do site customizations.
I think strange separate tab for configuration, maybe more easily on the page(Over)
And complex to do configuration... But cool.
And that problem:

17:10:14.762 TypeError: localStorage is null D5S6p27u5t8:11:214
https://www.youtube.com/embed/D5S6p27u5t8:11
https://www.youtube.com/embed/D5S6p27u5t8:11
moz-extension://e78eb895-53d3-4535-84ac-eaeb403d6b63/embeds.js:32
apply self-hosted:4419
applySafeWithoutClone resource://gre/modules/ExtensionCommon.jsm:539
applySafe resource://gre/modules/ExtensionCommon.jsm:526
applySafe self-hosted:1007
wrapPromise resource://gre/modules/ExtensionCommon.jsm:740