TIL Deep within the firefox source tree, there is a binary file called adult_set.bin, it's a set of md5 hashes for "adult sites"
https://searchfox.org/firefox-main/source/third_party/application-services/components/filter_adult/src/adult_set.bin
Most of these were previously stored in the firefox source code as base64'd hashes, and have been reverse engineered (https://gist.github.com/roycewilliams/04ed6eb9509b83ce4d85873861c7f7b4) (thanks for documenting that Royce Williams (npub1d9j…7m3z))
As far as I can tell, there is a single new entry in the list :
df26afcce27598ce38a4e4852cbb3380 (whose domain is documented here https://phabricator.services.mozilla.com/D15915)
Sarah Jamie Lewis
npub107…n9flh
2026-07-29 20:48:36 UTC
Author Public Key
npub107sgc6cx93hjzwamg73667lwv2w6hgpwfhq5acy70mjm7gp3rhqshn9flhSeen on
wss://relay.momostr.pinkPublished at
2026-07-29 20:48:36 UTCEvent JSON
{
"id": "30147ded526bc2526a6949119c45f6e32e88aa2ebab12d9f4749d67ac7e6a40f",
"pubkey": "7fa08c6b062c6f213bbb47a3ad7bee629daba02e4dc14ee09e7ee5bf20311dc1",
"created_at": 1785358116,
"kind": 1,
"tags": [
[
"p",
"69647d5b8817472ac2ced4b88fd94dceb69e7cb0603872771a6737470a865e1d"
],
[
"proxy",
"https://mastodon.social/@sarahjamielewis/117005229507425205",
"web"
],
[
"proxy",
"https://mastodon.social/users/sarahjamielewis/statuses/117005229507425205",
"activitypub"
],
[
"L",
"pink.momostr"
],
[
"l",
"pink.momostr.activitypub:https://mastodon.social/users/sarahjamielewis/statuses/117005229507425205",
"pink.momostr"
],
[
"-"
]
],
"content": "TIL Deep within the firefox source tree, there is a binary file called adult_set.bin, it's a set of md5 hashes for \"adult sites\"\n\nhttps://searchfox.org/firefox-main/source/third_party/application-services/components/filter_adult/src/adult_set.bin\n\nMost of these were previously stored in the firefox source code as base64'd hashes, and have been reverse engineered (https://gist.github.com/roycewilliams/04ed6eb9509b83ce4d85873861c7f7b4) (thanks for documenting that nostr:npub1d9j86kugzarj4skw6juglk2de6mful9svqu8yac6vum5wz5xtcwsyv7m3z)\n\nAs far as I can tell, there is a single new entry in the list :\n\ndf26afcce27598ce38a4e4852cbb3380 (whose domain is documented here https://phabricator.services.mozilla.com/D15915)",
"sig": "c70b6134a3e3de688b411cf71248af2f3c54c312d3ec2a58342f4397690fdfd2537f2238ea6f590fab194fd5d20322977f2445648e1816b7930ded31ae771d89"
}