The best AO3 extension out there.

Indispensable! Like streinen, mine stopped working recently, but the prerelease version 0.4.0 is working perfectly again:
https://github.com/jsmnbom/ao3-enhancements/releases/tag/v0.4.0-beta.10

Looking forward to the update here so I can add it back to my mobile browser (F-Droid Fennec)

such excellent QOL for fic browsing T-T <3

i really love this. just wish that there was a mobile version as i usually read ao3 on my phone. but otherwise its great ^-^

Perfect, only lacking feature is not being able to block fandoms and characters as well but for that I use AO3 Tag Blocker.

Really helpful addon. Would be pretty cool if it were available on mobile though, since I use Ao3 more on mobile.

Very useful! Wish I could find one for mobile with as many features thats still being supported.

Probably the best add on for Firefox if fanfic is your jam, and to second another, a mobile Firefox version would be amazing.

Works exactly as expected. I especially like the author/tag/language filters, and the interface for adding them. It is a very useful extension for blocking these.
The interface is very easy to use, and it looks very nice too, aesthetically.
I will definitely keep using this extension.

Wonderful, absolutely crucial extension! I won't lie, I'd kill for a firefox mobile version, though :P