Comment 3 for bug 884561

Check if doing something like:

ldd ~/.config/chromium/Default/Extensions/nmgdlklj*/2.3.0_0/bin/$(dpkg --print-architecture)/npchromifyosd.so | grep "not found"

Doesn't return to you this:
   libnotify.so.1 => not found

In that case you just need to link your libnotify.so.4 to a symlink libnotify.so.1
I'm not sure if doing this on that folder is enough, so I did this:

For amd64:
  sudo ln -s /usr/lib/x86_64-linux-gnu/libnotify.so.4 /usr/lib/x86_64-linux-gnu/libnotify.so.1

For i386:
  sudo ln -s /usr/lib/i386-linux-gnu/libnotify.so.4 /usr/lib/i386-linux-gnu/libnotify.so.1