all major browsers fetch HTTPS DNS records.
Regarding an HTTP/3 check on the page itself, that is difficult. Connecting from the browser window itself won't work, as the HTTP version is not revealed to the web context. I would need a dedicated backend server that tries to connect via HTTP/3 as a client.
Max Inden
npub15m…ch268
2026-06-09 19:02:59 UTC
in reply to nevent1q…vns4
Author Public Key
npub15mh2g3r2w340ad6tyelfnmj0a4rzc2vf5gasv2gtqsta4xkc9fmq7ch268Seen on
wss://relay.momostr.pinkPublished at
2026-06-09 19:02:59 UTCEvent JSON
{
"id": "d39ff6fd59f4e0f23a76287e2c310bc774b3e7056b3242728cd38f4dccb864cf",
"pubkey": "a6eea4446a746afeb74b267e99ee4fed462c2989a23b06290b0417da9ad82a76",
"created_at": 1781031779,
"kind": 1,
"tags": [
[
"p",
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[
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[
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[
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"web"
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[
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[
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"activitypub"
],
[
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[
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"pink.momostr.activitypub:https://mastodon.social/users/mxinden/statuses/116721698715533178",
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[
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],
"content": "all major browsers fetch HTTPS DNS records.\n\nRegarding an HTTP/3 check on the page itself, that is difficult. Connecting from the browser window itself won't work, as the HTTP version is not revealed to the web context. I would need a dedicated backend server that tries to connect via HTTP/3 as a client.",
"sig": "4ff9f9da29edc047d9eafb564cb4a0dffee9c3cdfacebd4383a443f1e8607b9cc6aee70ec9d8e6a0700f1a3622eb51c6a4c6cc5671bb1513bc4b2e5ffcebe9bd"
}