URL to the repository's source

Extensions may have a link to the homepage and the source. The maintainer how-to tells us “(you)… can also provide URLs to your homepage and/or source repository.” Please note the “can”. It’s not mandatory.

The idea is to allow users to look into the sources in case of binary extensions, eg. on Github. It is not meant to share content on a different site, although it sometimes makes sense. And it is definitely not suited to link to a sharing site like Google Drive, Microsoft OneDrive, Mega, MediaFire or the like.