v.0.1.7.3 (2014-08-09)

x Correctly restore closed non-private tabs in private windows.
* Improved favicons support in private:… bookmarks (#147).
* Updated Vietnamese locale (vi), thanks to Leof36.
x Fixed “private” protocol in Firefox 20 and 21 (#150).
* Enlarged extension icon for Add-on Manager: now used 48×48px instead of 32×32px.
x Fixed detection of emty tabs in Firefox 33+ (non-empty tabs was wrongly detected as empty and becomes non-private) (#152).