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Supernova 115* has been released with a new Thunderbird logo. Some people will love the new design and many may not be very bothered, but what happens if you really do not like it? The following information can be used to change that logo back to one used in version 102*.

I like to mute all of my tabs so they don't play annoying sounds. However a very annoying mute icon appears when I hover over it and the "muted" text is shown under the name. I tried adding to my userChrome.css:

@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul); .tab-icon-overlay[muted], .tab-icon-sound[muted] {

 display: none !important;

}

This only removes the muted icon, and when I hover over a tab its favicon disappears. I also tried changing browser.tabs.showAudioPlayingIcon as suggested in [answer] but it isn't an option anymore.

How do I remove it completely without changing the context menu item?

Recently the icon for several of my subfolders has changed from a folder to a letter. Why is this happening? How can I control/prevent it? I can't seem to delete these either. Any advice?