Based on our record, Tree Style Tab seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Tree Style Tabs were released for Firefox around 2007 https://piro.sakura.ne.jp/xul/_treestyletab.html.en#history I am not sure if someone was earlier, but Arc is copying this. - Source: Hacker News / 11 months ago
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