I have made a clean installation of Kubuntu 16.04 and played around with the font sizes and other settings (such as the fonts DPI, but I tried resetting it…) to make it more to my liking and everything works fine, except for Viber; It is huge! It takes up pretty much the whole screen and cannot be resized to a smaller window (as the interface itself appears enormous, the letters, everything). Any other program I've used is completely normal…
Ubuntu – Viber appears huge – Kubuntu 16.04
The reason is that 1920x1080 px on 13" screen has dpi of 166, what I have set in my xfce settings. A lot of apps powered with electron or other custom magic treat dpi over 140 as "retina" and double rendering size.
Viber settings screen cannot go UI scaling under 100%, so you can do it manually.
New solution (works for Viber >= v7.0)
Try running Viber from the terminal by specifying the
As a permanent solution, ensure the following line is in place in the Viber starter shortcut file (.desktop):
The Viber .desktop file is usually located at
/usr/share/applications/viber.desktop. A locally editable copy can be placed in
Old solution (works for Viber < v7.0)
sqlitebrowserfrom official repo, use it to open
Go to table
ScalingRatioto something under 1.0, I used 0.6.