The ignore answer button was gone for me too after I updated to macOS Sierra - which probably updated Safari as well.
Updating TamperMonkey from their website did the trick for me and I have the button back.
jdduarte said...Updating TamperMonkey from their website did the trick for me and I have the button back.Thanks. Never think I would have to update the monkey.
Safari 10.0 / MacAir 11 / OS X El Capitan 10.11.6
TamperMonkey 4.2.5291
I had decided not to get this one, but when äș appeared for my burn review and I was a bit to fast ending up typing ăź instead of ă« and hitting enter before I realized that i shifted one to the right when typing, thus failing, there was no way around it, haha 
Just fixed the script to work with FF57 and Greasemonkey 4
@srfacanha,
You may want to also cross-post this to the thread for the âactiveâ version of this script:
The thought crossed my mind. However theyâre no longer the same script. Iâd
have to look into that script and replicate the same changes.
Out of curiosity (and if itâs relatively simple to summarize), what was required to make it compatible with FF57/GM4? I havenât looked into GM4 issues yet.
Not much, just changing a couple of instructions that are no longer
supported (GM_addstyle) and change the way you access events, because GM4
doesnât allow direct access anymore (something related to their new
security approach). It doesnât affect other monkeys as far as I know, for
now⊠However it may need further changes in the future as they are
gradually removing backwards compatibility.
I can send the changes Iâve made, but not now, because Iâm typing from the
phone.
Thanks for the fix! youâre a champ!
You are awesome , thanks.
Pasting nowadaysâ replacement here. It would be easier when I canât remember the new scriptâs name, or forum searching fails to suggest the latest.