What distribution are you using? Sounds like a dependency problem... Without said library Fritzing segfaults.
Assuming you extracted fritzing in your Downloads folder try running ldd on fritzing to see whats missing
ie; command shell of your choice.
cd ~//Downloads/fritzing-0.9.3b.linux.AMD64/lib/
(or directory extracted to then cd to /lib folder)
then
ldd Fritzing
You should see and output similar to this.
linux-vdso.so.1 => (0x00007ffc9b38a000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007fe91b04f000)
libgit2.so.23 => /home/sysadmin/Downloads/fritzing-0.9.3b.linux.AMD64/lib/./libgit2.so.23 (0x00007fe91ad29000)
libQt5Svg.so.5 => /home/sysadmin/Downloads/fritzing-0.9.3b.linux.AMD64/lib/./libQt5Svg.so.5 (0x00007fe91aad5000)
libQt5PrintSupport.so.5 => /home/sysadmin/Downloads/fritzing-0.9.3b.linux.AMD64/lib/./libQt5PrintSupport.so.5 (0x00007fe91a868000)
libQt5Widgets.so.5 => /home/sysadmin/Downloads/fritzing-0.9.3b.linux.AMD64/lib/./libQt5Widgets.so.5 (0x00007fe919ff5000)
libQt5Gui.so.5 => /home/sysadmin/Downloads/fritzing-0.9.3b.linux.AMD64/lib/./libQt5Gui.so.5 (0x00007fe9197fe000)
libQt5Xml.so.5 => /home/sysadmin/Downloads/fritzing-0.9.3b.linux.AMD64/lib/./libQt5Xml.so.5 (0x00007fe9195c3000)
libQt5Network.so.5 => /home/sysadmin/Downloads/fritzing-0.9.3b.linux.AMD64/lib/./libQt5Network.so.5 (0x00007fe919263000)
libQt5Sql.so.5 => /home/sysadmin/Downloads/fritzing-0.9.3b.linux.AMD64/lib/./libQt5Sql.so.5 (0x00007fe91901f000)
libQt5SerialPort.so.5 => /home/sysadmin/Downloads/fritzing-0.9.3b.linux.AMD64/lib/./libQt5SerialPort.so.5 (0x00007fe918e06000)
libQt5Core.so.5 => /home/sysadmin/Downloads/fritzing-0.9.3b.linux.AMD64/lib/./libQt5Core.so.5 (0x00007fe9186f3000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fe918371000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fe918068000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fe917e52000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fe917a88000)
libssl.so.1.0.0 => /lib/x86_64-linux-gnu/libssl.so.1.0.0 (0x00007fe91781f000)
libcrypto.so.1.0.0 => /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 (0x00007fe9173db000)
librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007fe9171d2000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fe916fb5000)
libGL.so.1 => /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1 (0x00007fe916d44000)
libgobject-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 (0x00007fe916af0000)
libgthread-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgthread-2.0.so.0 (0x00007fe9168ee000)
libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007fe9165dc000)
libXext.so.6 => /usr/lib/x86_64-linux-gnu/libXext.so.6 (0x00007fe9163ca000)
libX11.so.6 => /usr/lib/x86_64-linux-gnu/libX11.so.6 (0x00007fe916090000)
libicui18n.so.56 => /home/sysadmin/Downloads/fritzing-0.9.3b.linux.AMD64/lib/./libicui18n.so.56 (0x00007fe915bf5000)
libicuuc.so.56 => /home/sysadmin/Downloads/fritzing-0.9.3b.linux.AMD64/lib/./libicuuc.so.56 (0x00007fe91583d000)
libicudata.so.56 => /home/sysadmin/Downloads/fritzing-0.9.3b.linux.AMD64/lib/./libicudata.so.56 (0x00007fe913e59000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fe913c55000)
/lib64/ld-linux-x86-64.so.2 (0x000055c7533e0000)
libexpat.so.1 => /lib/x86_64-linux-gnu/libexpat.so.1 (0x00007fe913a2b000)
libxcb-dri3.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-dri3.so.0 (0x00007fe913828000)
libxcb-present.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-present.so.0 (0x00007fe913625000)
libxcb-sync.so.1 => /usr/lib/x86_64-linux-gnu/libxcb-sync.so.1 (0x00007fe91341d000)
libxshmfence.so.1 => /usr/lib/x86_64-linux-gnu/libxshmfence.so.1 (0x00007fe91321a000)
libglapi.so.0 => /usr/lib/x86_64-linux-gnu/libglapi.so.0 (0x00007fe912fec000)
libXdamage.so.1 => /usr/lib/x86_64-linux-gnu/libXdamage.so.1 (0x00007fe912de8000)
libXfixes.so.3 => /usr/lib/x86_64-linux-gnu/libXfixes.so.3 (0x00007fe912be2000)
libX11-xcb.so.1 => /usr/lib/x86_64-linux-gnu/libX11-xcb.so.1 (0x00007fe9129e0000)
libxcb-glx.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-glx.so.0 (0x00007fe9127c6000)
libxcb-dri2.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-dri2.so.0 (0x00007fe9125c1000)
libxcb.so.1 => /usr/lib/x86_64-linux-gnu/libxcb.so.1 (0x00007fe91239f000)
libXxf86vm.so.1 => /usr/lib/x86_64-linux-gnu/libXxf86vm.so.1 (0x00007fe912198000)
libdrm.so.2 => /usr/lib/x86_64-linux-gnu/libdrm.so.2 (0x00007fe911f89000)
libffi.so.6 => /usr/lib/x86_64-linux-gnu/libffi.so.6 (0x00007fe911d80000)
libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007fe911b10000)
libXau.so.6 => /usr/lib/x86_64-linux-gnu/libXau.so.6 (0x00007fe91190c000)
libXdmcp.so.6 => /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007fe911705000)
Give it a try, see what you get.