With the Steam Workshop, finding and installing X Rebirth extensions is now easier than ever before. Just browse the extensions in the Workshop, subscribe to an extension that you are interested in, and it will be installed automatically the next time your start X Rebirth. Just make sure you read the description and check for incompatibilities with other subscribed extensions.
Extensions from the Workshop will also be updated automatically when the author submits updated content. To disable an extension on the next game start, just unsubscribe from it, either in-game or on the Steam website.
General publishing rules
General rules and guidelines:
Do not publish extensions that you haven't made yourself, unless you have the author's consent.
Similarly, do not publish modifications of other people's extensions (e.g. fixed versions) without the author's consent.
Do not publish the same extension multiple times. If you are not sure if an upload worked, check your Workshop items online.
If your extension depends on other extensions or if it is potentially incompatible with other extensions, use the description text to warn players.
X Rebirth extensions support localisation of name and description, but unfortunately the Steam Workshop does not. The title and description texts of Workshop items should be in English, unless you provide content specifically for a non-English audience. But even then, please make sure that English-speaking players can see from the title and description what the item is about.