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From the old "how do I disable overlay scrollbars?" question, I tried apt-get remove overlay-scrollbar, then restarting my session.Checked Tools -> Addons -> Extensions and disabled the "Ubuntu Modifications" addon.Tried changing Firefox theme to several complete themes - several of these changed every aspect of the Firefox UI except the scrollbars and popup menus, others did change them but I just didn't like their aesthetics.Checked Tools -> Addons -> Appearance to see if it's a distinct theme from the default - it isn't, this IS the default.I want to keep Firefox 46.0 but get rid of the sucky Ubuntu UI theme. Scrollbars are orange flat-design travesties.Menus and textbox popups use grey text on Ubuntu off-black background.Scrollbars are grey, have up/down/left/right icons.Menus and textbox popups use black text on light grey background.How can I disable these, and get back the standard Firefox/GTK style? The release has brought an unwelcome change the ugly Ubuntu scrollbars, and even uglier Ubuntu menu colours. I'm running Ubuntu 16.04 and I've just upgraded the firefox package (released today) from 45.0.2 to 46.0.
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