Do we know why the addon stopped working? It doesn't seem to be linked to a browser update.
On Firefox, I can middle-click on articles I don't want to read and delete all the tabs in a row. They appear in gray next time I visit HN. It works but it is cumbersome...
It may be possible to write a script to save the current page source code, extract all the links it contains, send a "GET" to them and hope they will appear in grey in HN, as if we actually clicked on them. I would like to be able to do it and share it.
(edit) just saw iisbum dit it ;)