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Waterfox 2019.10 Current - Windows 10 1909…
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at https://github.com/piroor/treestyletab/wiki/Code-snippets-for-custom-style-rules#for-userchromecss you suggest some css to hide the normal top tab bar, but you get some messed up overlaying of the …
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This is just a question. Is there a way to set a Mac OS X style transparent background? Firefox surely supports that.
![image](https://user-images.githubusercontent.com/20413685/49369406-a58f8e00-f…
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* Version of Firefox: 57+