How to Use SteamRelink:

1. Go to the Steam Workshop item you want to share.
2. Copy the Workshop ID in the URL after ?id=.
3. Add it to this page's URL as ?id=WORKSHOP_ID.
4. Open the URL in your browser.
5. This page will open the item in your Steam client.
6. If Steam is closed, it will redirect to the Workshop page in 10 seconds.

Example:

Fast mode (skips the 10-second wait):

Fast mode fires the Steam launch immediately, no countdown. The SteamRelink userscript can also auto-close the tab afterward.

Not sure your browser will let this through?

This just fires the "Open in Steam?" prompt on its own, no countdown or redirect attached,
So you can check (or tick "Always allow")