Add a way to easily share redirects
Maybe a button to copy the redirect as JSON for exporting, and a button that shows an input that accepts the JSON for importing.
Another potential way is something similar to Stylus's userstyle importing. If you go to a link ending in
.user.css it detects that and shows a page for you to import that style.
holllo.org/re-nav/share#json=<base64-encoded JSON> could be used and using a content script a button gets added to the page to import it.
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