Rated 4 out of 5 stars

Works well, but needs an options menu. In particular, it places itself in menus like the main menu and right-click menus that leave you no option to remove them. You also cannot customize the shortcut key.

This review is for a previous version of the add-on (0.1.6). 

> In particular, it places itself in menus like the main menu and right-click menus that leave you no option to remove them.

You can hide them using userChrome.css (or Stylish extension), see
https://github.com/Infocatcher/Private_Tab#styles
and https://github.com/Infocatcher/UserStyles/tree/master/Private_Tab_hide_items


> You also cannot customize the shortcut key.

See extensions.privateTab.key.* preferences on about:config page:
https://github.com/Infocatcher/Private_Tab/blob/master/defaults/preferences/prefs.js