20: Add rel="noopener" for a tag security.
20: Add rel="noopener" for a tag security.

Links to cross-origin destinations are unsafe
https://developers.google.com/web/tools/lighthouse/audits/noopener

https://github.com/wnoguchi/blog-link-clipper/issues/20

wnoguchi/blog-link-clipper,wnoguchi/blog-link-clipper,wnoguchi/blog-link-clipper