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Mark Nottingham

@mnot.net
938 followers 119 following 169 posts

Co-chair IETF HTTP & AIPREF WGs, member Internet Architecture Board, standards lead at Cloudflare. Interested in the intersection of legal regulation and technical standards. My social media is mostly-write: if you want to be sure I see something, e-mail.

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Mark Nottingham @mnot.net · 18/09/2026
Safari 27.0 fixed a bunch of caching bugs. github.com/http-tests/cache-tests/c…
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Mark Nottingham @mnot.net · 17/09/2026
@rizzi I just updated to MacOS 27 and Reeder Classic was silently replaced by Reeder -- and all of my subscriptions are gone. Help?
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Mark Nottingham @mnot.net · 07/08/2026
What 120 million HTTP responses from Common Crawl reveal about how protocol extensions actually get deployed — and what that should tell us when we design new ones. mnot.net/blog/2026/linting_the_web
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Mark Nottingham @mnot.net · 30/06/2026
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Mark Nottingham @mnot.net · 30/06/2026
Because technology is always neutral. www.youtube.com/watch?v=mBW9QCVDSjY
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Mark Nottingham @mnot.net · 20/06/2026
Now getting AI generated spam tailored to my blog entries (badly). We are indeed on the shittiest timeline.
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Mark Nottingham @mnot.net · 19/06/2026
When to reach for a well-known URI — and the traps that catch most protocol designers. mnot.net/blog/2026/well_known_uris
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Mark Nottingham @mnot.net · 11/06/2026
As always, @kkomaitis nails it: "[W]hen trust dissolves in networked systems, states do what states have always done: they seek insulation, redundancy, and control. Digital sovereignty, in that sense, is not merely ideological fragmentation. It is geopolitical insurance against uncertainty in an
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Mark Nottingham @mnot.net · 31/05/2026
Anybody else getting this on random Web sites? Any of my Googly friends care to comment? (Safari latest, been happening for the last <1 week)
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Mark Nottingham @mnot.net · 31/05/2026
OH in coffee shop: “The final season of America is riveting.” Response: “But we’ll be disappointed with the finale. Just like Game of Thrones.”
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Mark Nottingham @mnot.net · 23/05/2026
My father-in-law passed recently, and so I was helping my mother-in-law clean up the digital leftovers today. It turns out he had subscribed to a few substacks. They had a shared e-mail address, so I went to unsubscribe him and delete the account. Substack has decided to handle Australia's age
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Mark Nottingham @mnot.net · 19/05/2026
Anyone want to go in on a proposal for a Unicode emoji of a guillotine? It feels very 2026.
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Mark Nottingham @mnot.net · 16/05/2026
and... "Regulation that’s defined entirely in terms of the technology it regulates, as opposed to in terms of the effects it has on society or imposing boundaries and limits on the technology itself, is a core component of the technopolistic political and legislative environment."
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Mark Nottingham @mnot.net · 16/05/2026
"The game of technology is defined and controlled by the United States of America. Local governments can impose rules that moderate the impact, but genuine limitations on technology are impossible. Or, they used to be." www.baldurbjarnason.com/2026/the-ol… Via
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Mark Nottingham @mnot.net · 13/05/2026
> pipx install feed-survey > feed-survey-probe -r mnot.net
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Mark Nottingham @mnot.net · 12/05/2026
"A stable competitive market never has more than three significant competitors, the largest of which has no more than four times the market share of the smallest." www.bcg.com/publications/1976/busin…
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Mark Nottingham @mnot.net · 11/05/2026
I looked through Common Crawl and found over 300,000 parseable RSS/Atom feeds, confirming that Web feeds are still a major part of the Open Web. But most aren’t high quality, and autodiscovery often points users at stale or abandoned feeds. mnot.net/blog/2026/feed-survey
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Mark Nottingham @mnot.net · 24/04/2026
Every online interaction is a lopsided negotiation. For AI to truly work for us, we need more than just safety -- we need to start building true agency. www.mnot.net/blog/2026/04/24/agents…
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Mark Nottingham @mnot.net · 23/04/2026
Implementation as a browser extension here: github.com/mnot/feedmenu-extension
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Mark Nottingham @mnot.net · 23/04/2026
Playing around with a new way to discover feeds on a site; feedback most welcome. www.ietf.org/archive/id/draft-notti…
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Mark Nottingham @mnot.net · 21/04/2026
This needs to be spread wide and far. www.themandarin.com.au/311397-priva…
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Mark Nottingham @mnot.net · 13/04/2026
If this is true, AI creates even more pressure towards centralisation than is obviously apparent (and there's a lot that's apparent). For previous thoughts, see: www.mnot.net/blog/2024/11/29/platfo…
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Mark Nottingham @mnot.net · 13/04/2026
I wrote a while back about Carliss Baldwin's excellent insights into platforms and openness. One of her underlying points (AIUI) is that modularity helps manage complexity, and at a certain scale and under certain conditions distributing it across multiple companies through standard interfaces
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Mark Nottingham @mnot.net · 10/04/2026
AI seems to have the same pathology that leads humans to name files like "report_final_done_final2_lastone_finanimeanit_revision3"
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Mark Nottingham @mnot.net · 10/04/2026
In the last few weeks, Trump has done more for the worldwide adoption of electric vehicles than any previous US president. Congratulations.
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Mark Nottingham @mnot.net · 10/04/2026
In 2026, kids skating in public spaces isn’t annoying - it’s FUCKING WHOLESOME, carrying on a 40+ year legacy, and certainly should not be considered any kind of crime.
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Mark Nottingham @mnot.net · 08/04/2026
Guidelines for aspiring Nobel Prize winners: 1. Do not threaten other countries with wholesale destruction and possible genocide.
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Mark Nottingham @mnot.net · 24/03/2026
Standards work is notoriously hard to track. Let’s explore if grounding AI in working group records can make that history more accessible. www.mnot.net/blog/2026/03/25/using_…
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Mark Nottingham @mnot.net · 17/03/2026
To help find relevant RFCs no matter what your network connectivity, rfc.fyi now implements a service worker that caches the data locally for offline use, and can be installed as a Progressive Web app (PWA) -- i.e., you can install it to your iOS or Android home screen. Note that it still
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Mark Nottingham @mnot.net · 09/03/2026
More belated introspection from the adtech industry. www.adexchanger.com/data-driven-thi…
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Mark Nottingham @mnot.net · 20/02/2026
Openness makes the Internet harder to govern — but also makes it resilient, innovative, and difficult to capture. Let's look at how the openness of the Internet both defines it and ensures its success. www.mnot.net/blog/2026/02/20/open_s…
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Reposted by Mark Nottingham
Alex Russell @infrequently.org · 13/02/2026
If you work on the web, you should read @mnot.net's latest: mnot.net/blog/2026/02/13/… It much more elegantly gets to the core of the pro/anti-progress asymmetry I tried to explore last year: infrequently.org/2025/08/how-do-c…
mnot.net
The Power of 'No' in Internet Standards
The voluntary nature of Internet standards means that the biggest power move may be to avoid playing the game. Let's take a look.
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Mark Nottingham @mnot.net · 13/02/2026
The voluntary nature of Internet standards means that the biggest power move may be to avoid playing the game. Let's take a look. www.mnot.net/blog/2026/02/13/no
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Mark Nottingham @mnot.net · 10/02/2026
Hmm, this one shows promise... consult.treasury.gov.au/c2026-739506
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Mark Nottingham @mnot.net · 04/02/2026
Right now, companies are hawking new AI features. They're not built for users -- they're built to satisfy management and investors. I'll know they're serious when they start pushing new features that *happen* to use AI, but are designed to solve specific problems.
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Mark Nottingham @mnot.net · 31/01/2026
Social media companies baking fake notification indicators into their favicon is borderline abusive behaviour.
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Mark Nottingham @mnot.net · 20/01/2026
The Open Web means several things to different people, depending on context, but recently discussions have focused on the Web's Openness in terms of access to information -- how easy it is to publish and obtain information without barriers there. www.mnot.net/blog/2026/01/20/open_w…
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Mark Nottingham @mnot.net · 13/01/2026
www.foreignaffairs.com/united-state…
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Mark Nottingham @mnot.net · 11/12/2025
Software update #2: I've made a small tweak to rfc.fyi to make it much more useful; when considering how many references an RFC has, it also counts those from the RFCs it obsoletes. That means that searching for a term like 'HTTP' or 'DNS' returns the most relevant RFCs first!
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Mark Nottingham @mnot.net · 11/12/2025
Software update #1: redbot.org has a range of new tests -- including updates to caching and support for Content Security Policy, Permissions Policy, and CORS -- and now is multilingual! Please take a look and give feedback.
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Mark Nottingham @mnot.net · 27/11/2025
French-speaking friends, does this make sense? How awful is the translation? gist.github.com/mnot/47d819b1907ca1…
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Mark Nottingham @mnot.net · 24/11/2025
“An industry without newcomers is a dying industry.” -- Rolex CEO Jean-Frédéric Dufour at Dubai Watch Week
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Mark Nottingham @mnot.net · 14/11/2025
"[G]overnments that seek to systematically undermine democratic institutions will seek, first and foremost, to move away from the law and from expertise." academic.oup.com/jeclap/advance-art…
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Mark Nottingham @mnot.net · 09/11/2025
Davies draws an interesting line between Ferdinand Porsche, Donald Knuth, and startup culture. monocle.com/business/in-defence-of-…
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Mark Nottingham @mnot.net · 07/11/2025
"[Meta and Alphabet] are not merely participants in the advertising industry; they are its epistemic gatekeepers. By institutionalizing concepts like programmatic targeting, multi-touch attribution, and performance-based media as unquestioned "best practices" they have engineered a paradigm in which
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Mark Nottingham @mnot.net · 26/10/2025
Some thoughts about how to schedule online meetings for a global organisation in an equitable way. www.mnot.net/blog/2025/10/26/equita…
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Mark Nottingham @mnot.net · 26/10/2025
"AI hucksters [...] will tell you that there is only one way that this technology can be used: to fire a whole ton of workers and make the survivors do their job at frantic Lucy-in-the-chocolate-factory cadence. While it’s true that this is the only way that their companies could possibly be worth
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Mark Nottingham @mnot.net · 01/10/2025
RFC 9842 is HTTP Compression Dictionary Transport -- this is a big one! Congrats @Yoav and @PatMeenan ! www.rfc-editor.org/rfc/rfc9842.html
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Mark Nottingham @mnot.net · 20/09/2025
Achieving policymakers' goals in coordination with Internet standards activity can be difficult. This post explores some of the options and considerations involved. www.mnot.net/blog/2025/09...
mnot.net
Bridging the Gap Between Standards and Policy
Achieving policymakers' goals in coordination with Internet standards activity can be difficult. This post explores some of the options and considerations involved.
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Mark Nottingham @mnot.net · 16/09/2025
What is this new rounded corner hell?
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