FF 52 does look to be working as expected.
Oh, & that's weird.
It also just now worked - in the same SeaMonkey Profile where a moment ago it did not work.
And at the same time, it is NOT working at 
http://forums.mozillazine.org/index.php.
Post & immediately jump to a new tab.
Notice (without actually return to the tab, yet) that the background tab does "refresh".
Nothing noted in Error Console that anything was blocked.
Now return to that tab, & note that it had indeed refreshed.
Most likely I did notice that at mozillazine, & had only test there.
For FF & XP, I thought, oh, I can just test here, informaction.
So I guess I now need to test FF at mozillazine...
FF 52 does seem to be working - at mozillazine.
So this might be SeaMonkey specific.
And in another test, new, clean SeaMonkey Profile, install 5.1.7, restart & post:
Code: Select all
[NoScript] Blocking refresh on unfocused tab, http://forums.mozillazine.org/posting.php?sid=800f005fcd56bb4a5e765c9e04a74b30->http://forums.mozillazine.org/viewtopic.php?f=38&t=3035740&p=14779203#p14779203
So Error Console did log the "block", but in fact the action, refresh, was not blocked.
And yet in further, same Profile, go back, Edit, Submit, it was blocked as expected?
So... ?