Compare https://phabricator.kde.org/source/heaptrack/ (scroll to bottom)urrently Phabricator has some limitations in it's handling of README.md files in comparison to Github.
This concerns in particular:
1) Rendering of images should be inline
with https://github.com/KDE/heaptrack2) Additional URI rendering formats
Note how the screenshots are not rendered.This is tracked by upstream https://secure.phabricator.com/T5698