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-2.4.4.dmg
8b73328c09336c661b2a6ecf3ab9663caa75c61f3d4b13eb0e8198f3f0f8b102Download for Mac
$ certutil -hashfile Jaxx.Liberty-setup-2.4.4.exe sha256
bdc0be88527d0ec6c006cf2d48d0e3ff9d58471f9292c4211cb4a581fffddb0dDownload for Windows
$ shasum -a 256 Jaxx.Liberty-2.4.4-i386.AppImage
3a9bc1b73fcbb595d85f4261000d993d189f72fd97105ca0dd5e60c6c82dd7feDownload for Linux 32
$ shasum -a 256 Jaxx.Liberty-2.4.4.AppImage
4d9967a81a405db9580de7e0da32f7749e1e6d0fdaeab2b68ddbfe82d7c42b78Download 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.