In July 2025, @0x3b0b posted a blog post, noting the Actually Legitimate URL Shortener was causing a problem:
...It was uBlock Origin. More specifically, it was a custom filter list I added to my uBlock Origin configuration somewhere along the way, the ➗ Actually Legitimate URL Shortener Tool. I don't remember why, so I should probably dig into that and see whether I really want that filter list - that's neither an endorsement of the list itself nor a censure; I'm just acknowledging that if I don't remember why I'm using it, I should probably make sure I still want to. I think I must have started using that list more recently than I thought, because I don't think I always had this problem with my blog, but this commit from October 2023 added a filter to remove the query-string parameter ap_id any time it appears. And that's the parameter #microblogpub uses on the /object endpoint when the logged-in admin wants to look at a post in its threaded context, to identify the post being focused.
https://bw3.dev/articles/2FHb1/state-of-the-blog-address
I happened to find that blog post when searching the internet for pages referencing "Actually Legitimate URL Shortener Tool" - it was on page 5 of my search results.
And now, months later, I have patched it: https://github.com/DandelionSprout/adfilt/commit/b4b12d96eb0501e8dd2bdc3691199c50bc7542f0
If someone uses this software, and can confirm the patch works (or doesn't), I would appreciate feedback.
I don't want to shame OP, but in the future, if anyone has an issue with the Actually Legitimate URL Shortener, the best place to report it is in this GitHub Discussions thread: https://github.com/DandelionSprout/adfilt/discussions/163
Maybe the OP did report it there and it just got buried, I don't know. Again, I'm not trying to shame the OP, just trying to inform people since not everyone knows.
Response times for issue reports range from a few minutes to a few months, depending on how busy we are. Generally issues should be addressed within at most a week.
If you don't have a GitHub account or don't get a timely (within a week or two) response, feel free to ping me here or by email.

