It is fully open source, you can take it, alter it to your hearts content and share it again if you wish to. I made it because I wanted this feature on firefox as well but there were no alternatives, glad I could help others who also desired this feature.

Two indentical panels in retrospect, an unnecessary idea. My goal with that was, you can set a global change and still be able to individually alter certain pages, but I found zero uses for the global setting. I doubt other people has either. Perhaps I should remove it. Thank you for your review!

I am sorry that it didn't work for you. Could be many things that are causing the issue, so I can't help you without attaining some data.

I tried to learn different methods of implementation and none of them seem to work. I am not an expert in the field of audio engineering, so I don't understand which method is the best for this application. I looked into what FL studio uses for inspiration, but their methods also sound stuttery. Maybe one day if I learn, I will implement it.

Thank you for rating it!

I appreciate that Lucas, welcome to Firefox! I created this add-on after coming from Chrome, as there were no alternatives before mine. I appreciate the nice words, glad I could help.

No problem, chief

You're welcome!

Thank you! People like you are the reason I shared my project, I hope you get to enjoy many more music in novel pitches and speeds. As for the request, very interesting, I will need to do a bit of research and see if I can implement it.

I just did some preliminary look-about and I see how it might benefit the program. I will try to implement it. If I do, I will edit this reply to tell you I have.
EDIT:

I have added the formant shift function you wanted. As soon as Version: 2.3.3 goes up, you can enjoy it to your hearts content. I hope it makes your day. I am glad you showed me this function, I never knew it existed before, not even in FL studio. I appreciate that.

Thank you! I will look into it tomorrow.

Edit: I have added the feature to use it in spotify. Enjoy! I also use spotify, so it will be useful for me too, so, thank you for the idea. It will take into effect as soon as firefox updates it to the 2.2.1 version.

Thank you for your comment, it made me happy!

Thank you!

Thank you for your feedback! I wanted the user to have the ability to have one global effect whilst having the per tab effect override the global effect. I also thought it would be nice if I could have just a single settings section as you said, it feels redundant, but then the user wouldn't be able to change the global settings without closing the per tab setting. I thought I could add a tab system, but I didn't like the feel of it. The speed control is a great idea, I will most likely add it on the next update.

You are absolutely right. I am sorry, I use it to make vaporwave songs on the spot for myself. I will add that functionality and update the plugin for you.

I just added the function you wanted. Enjoy!