Disable the character scrolling effect for certain websites in the tab bar settings.

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Some websites set character scrolling effects in the Firefox tab bar, and some even include emoji icons, which are a distraction for users. It is recommended to provide an option to disable this in "about:config". For example, on the website below, the character scrolling is triggered when the focus is not on this tab:

https://powkiddy.com/products/pre-sale-of-powkiddy-rgb20-pro-handheld-game-console

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Most of these are selfish and unethical websites, and there are many of them in China as well.