flatpak install io.github.mightycreak.DiffuseFlatpak is probably the easiest way to install Diffuse on any distribution and get the latest and greatest as quickly as possible. The Flatpak package is hosted on Flathub.
Note: If the Flathub repository is not installed yet, please follow these instructions.
The Diffuse package statuses for every distributions can been seen on repology.
Huge thanks to @bongochong for maintaining the Diffuse package on Fedora.
Diffuse is compatible with git difftool command-line. To use Diffuse as Git
diff tool, run:
git config --global diff.tool diffuse