copy public URL on anchor context

Unfortunately, I don't know when this stopped working, or if it's actually intended to work this way.
But at some point previously, I could right-click anchors and copy their specific public url.
Now, when I do the same, it copies the public url to the current path, without the anchor's target.

e.g.
This
Should put
http://ipfs.io/ipfs/QmWn4vJepGcAEmT36FDL6ca1RxSXiuca9Ew8pb7RZGKbq4/symlink-tree.tar.xz
on the clipboard, but I end up with just
http://ipfs.io/ipfs/QmWn4vJepGcAEmT36FDL6ca1RxSXiuca9Ew8pb7RZGKbq4

Edit:
For reference, I'm getting this on Firefox and Vivaldi, with the latest stable and beta.

Start by reproducing the right-click action on an anchor in Firefox or Vivaldi, then trace the extension's context-menu URL construction. Confirm that copying an anchor includes its target path and that copying the current page still works; the expected clipboard value is shown in the issue.

Written by the indexing model from the issue text.