The checksums below are a simple way for you to double-check the copy of Jaxx you are installing is genuine. You can match the checksum in your instance of Jaxx with the data below.
$ shasum -a 256 Jaxx.Liberty-2.2.8.dmg
fb7df891cf65c8037c265ff5ab0405b00714f3e6336f84ca56dece027cb0523bDownload for Mac
$ certutil -hashfile Jaxx.Liberty-setup-2.2.8.exe sha256
655243a81cf61ec9d6242330eefbe947ec6a2b37bf6620de1e76abc18a458e38Download for Windows
$ shasum -a 256 com.liberty.jaxx-2.2.8-i386.AppImage
f19737654fd01d748db68d17fc58a29a8fae501d641c973c69eb770b5a55e967Download for Linux 32
$ shasum -a 256 com.liberty.jaxx-2.2.8-x86_64.AppImage
d9bc346e719a06c8f8e37fd63d95f0ece53ac498d5bbe247bbe64734efb4644eDownload for Linux 64
*Mac OS X Note: Depending on your system settings, the system might warn you that "Jaxx can't be opened because it comes from an unidentified developer." You can either change your system settings to allow apps from unknown developers in your "Security & Privacy" settings, or simply right click Jaxx → Open (as administrator), which will prompt you with a warning.