Firefox Quantum (ver >= 57) - How Can I Hide the Horizontal Tab Bar with TreeStyle Tabs?

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Track title: CC O Beethoven - Piano Sonata No 3 in C

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Chapters
00:00 Question
00:50 Accepted answer (Score 38)
02:13 Thank you

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Full question
https://superuser.com/questions/1261660/...

Question links:
https://addons.mozilla.org/en-US/firefox.../
http://piro.sakura.ne.jp/xul/_treestylet...

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Tags
#firefox #firefoxextensions #css

#avk47