I did just update the Blurb Blocker script and pasted in my blacklist, and it's still not working. I run the most current version of Firefox on both. I used the script on a MacBook Air (daily) and on an iMac (very infrequently), and the script broke on both machines within a few days of each other.
It's pretty heavily filtered, but I don't think I added any additional filters right before the script broke for me. I check the following AO3 page daily: =revised_at&work_search=&work_search=&work_search=1&work_search=0&work_search=1&commit=Sort+and+Filter&tag_id=One+Direction+%28Band%29 Glad to hear it's not broken for everyone, but I'm really stumped about why it's a problem for me. Hey, sorry to reply here so late - I never got a DW comment notification and was just randomly checking back to see if anyone else reported the same problem.