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-2.4.0.dmg
8783e1d18fb4739875ae3622b2cf02d7870d6d996cb338b9cb28bd020d16b6a0Download for Mac
$ certutil -hashfile Jaxx.Liberty-setup-2.4.0.exe sha256
23832f59f0ad9b2c79cf9a35eb6346a496ff26fbe9ed0f7aab07bb5d0462be72Download for Windows
$ shasum -a 256 Jaxx.Liberty-2.4.0-i386.AppImage
875574f88150de3f65b0257cf0596821a10b408daa5b0cd3848fb032f0c9b904Download for Linux 32
$ shasum -a 256 Jaxx.Liberty-2.4.0.AppImage
7f5741620be06c7e9f128bd47ee17a9474e364ff7a8f2c7feaa5dc28dc5c9a8bDownload 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.