Inactive tabs are transparent

[alexwhitman]

On Ubuntu 16.04, inactive tabs are transparent and the desktop can be seen:

Also, the top and bottom of the tabs have more padding than is necessary in my opinion (but this may be by design).

[gnunn1]

Interestingly the tab size in Ubuntu is inconsistent, compare the tabs in Nautilus versus gedit for example. I've opted to emulate gedit since more people will see that but just a point of interest.