This code snippet provides two commands to save and capture with org-mode at one go. It also adds key-bindings for these commands.
Usage: Put the script into your conkeror script folder. Call M-x org-save (bound to M-S) if you want to save and capture the page or a link, call M-x org-complete (bound to M-C) if you want to capture the current page and save it with all its supporting documents.