Tested 73.0.1 / 74.0 / Windows 10 / Linux Default Dark Theme
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Go to your profile directory by typing
about:configin your address bar. -
In side the directory, open the terminal, run:
git clone https://github.com/datttran/chrome.git -
Open a new tab in Mozilla Firefox. Type
about:configin the address bar. Confirm that you will be careful if a warning message appears for you. -
Enter the following text in the search box: toolkit.legacyUserProfileCustomizations.stylesheets.
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Set the option
toolkit.legacyUserProfileCustomizations.stylesheetsto True. -
Restart Firefox
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Add OS style buttons extension
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Enjoy the result.
- For blur style search and bookmarks bar, go to
about:configsetlayout.css.backdrop-filter.enabledandgfx.webrender.enabledto true.

