Thunderbird 68: CSS to change Quote Colours

in older Thunderbird, I used the addon “QuoteColors”, which nicely color quoted text in emails. With Thunderbird 68, this addon is no loner compatible, so I am trying to achieve the same with css: This is my userContent.css blockquote[type=cite] { border-color: #ff3f55 ! important; color: #ff463a ! important; background: #454545; ! important; } blockquote[type=cite] blockquote…

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