Firefox close tab buttons on mouse hover

I used to have Firefox’s TabMix Plus addon installed. And the feature I missed most - surprisingly - is to have the “close tab” buttons appear on a tab when you hover the mouse over it.

Googling a little bit told me how to bring it back:

UPDATE 2024-08-24

Forget everything you read here and go to this page: mattsch.com/2016/01/04/firefox-close-tab-button-on-hover

It’s all you need :) .

For my personal reference (please still go to Matthias’ page, he’s the one who did the actual work):

• Create a userChrome.css file ($ FF_PROFILE_FOLDER/chrome/userChrome.css)
• Enter the code below (taken from here, which is basically the original of this article)

/* FF 113+ ONLY! */
.tabbrowser-tab:not([selected]):not([pinned]):hover .tab-close-button {
    display: flex !important;
}