@jsonbecker Thanks for the idea, but this seems to just add a javascript into the head of the html. My problem appears while converting markdown to html because Goldmark converts any footnotes with unique IDs to numbered ones.

So this : [^1-2024-11-19-I-AM-UNIQUE] is turned into this in the rendered HTML: <a href="#fn:1" class="footnote-ref" role="doc-noteref">1</a>. However also this - in another blogpost - would be turned into the same HTML: [^1-2024-11-19-I-AM-ALSO-UNIQUE]. On individual pages that's not a problem, but on list pages - which is how you'd normally read a blog - the references for footnotes now only work for the first blog post.