Until you upgrade to hosted seedbox this is the most excellent pairing of NZB indexer with usenet fetching via nzb. It is easy to setup (with sabnzbd+)

It has all the features I need.
Particularly like the possibility to add a Newznab site manually (mine is nzbplanet)
Big thanks to the developpers.

Excellent extension, works great, nice UI. A solid improvement over SABconnect++.

I'm very impressed. I never heard of this software before. It was recommended by one of my indexers. I'm still playing around with it between my laptop and PC, but I have concerns it's not saving my SAB information. I'll keep using it to see if what I think is a problem reproduce. Other than that, it's a REALLY handy tool. Nice not having to tediously enter my SAB information for ever index. :-)

Works for me in latest version of Firefox

The SSL cert for sabnzbd is invalid by default as it's self-signed. You need to open the site in Firefox first and a security warning will be shown. Add an exception for the site and then add your connection details to NZB Unity and it should work fine.

Finally a replacement for nzbfox. Thank you so much!

Functionally this add-on is just about there and works well. It mostly needs UX and design improvements.

It's currently the only add-on in this category that works with Firefox 57, so I can't complain too much!

Great functions and easy to use!