Tessera

ActivityPub Won by Being Boring ActivityPub worked because its core stayed ordinary: JSON, HTTP, inboxes, outboxes, and simple activities. The hard parts now are signatures, trust, defederation, portability, and scale. s.ee/8qbD #ActivityPub #Fediverse #OpenStandards

ActivityPub Won by Being Boring

At FediForum 2026, ActivityPub co-author Evan Prodromou explained why the protocol succeeded by staying deliberately ordinary and why the W3C's Q3 2026 revision needs to keep it that way.

s.ee

Announcement: `relay.c.im` will shut down permanently on October 31, 2026. Existing subscribed instances can disconnect manually. Admins who rely on relays should migrate before then. s.ee/ohub #Fediverse #ActivityPub

relay.c.im Will Shut Down on October 31, 2026

Owl Owl OÜ will permanently shut down the public ActivityPub relay at relay.c.im on October 31, 2026; instance admins who rely on relays should migrate before then.

s.ee

P.LU is now on PeerTube 8.2.2. This is a security patch: upstream says vulnerabilities rated medium to high affect PeerTube 8.2.1 and earlier. No CVEs/details yet, so instance admins should patch before disclosure. s.ee/MJ7N #PeerTube #Fediverse

PeerTube Updated to 8.2.2

P.LU is now running PeerTube 8.2.2, a security patch for vulnerabilities upstream rates from medium to high severity in PeerTube 8.2.1 and earlier.

s.ee

C.IM is now running Mastodon v4.6.3. This pulls in the v4.6.2 FFmpeg security release, plus v4.6.3 fixes for filters, collections, search, email image rendering, and a few 4.6 web UI rough edges. s.ee/5bga #Mastodon #Fediverse

Mastodon Updated to 4.6.3

C.IM is now running Mastodon v4.6.3, with the v4.6.2 FFmpeg security release included and the v4.6.3 web UI fixes applied.

s.ee

Mastodon is not one website. It is open-source social networking software for a federated web: many servers, local rules, ActivityPub between them, and no single owner of the whole conversation. We wrote an explainer: s.ee/2L9U #Mastodon #Fediverse

What Is Mastodon?

Mastodon is open-source social networking software that lets independently run servers form one network without one company owning the whole thing.

s.ee

New on the o.ee blog: a plain-language explainer of ActivityPub, the protocol that lets Mastodon, PeerTube, Lemmy, and other Fediverse apps talk to each other. Why it works, where it still feels rough, and why instance choice matters. s.ee/xEcu

Open-Source, Independent, Privacy-First Internet Services

Owl Owl OÜ operates C.IM (Mastodon), P.LU (PeerTube), R.NF (Lemmy), and Image.Hosting from the EU, with no ad business.

o.ee

AI didn't create the FFmpeg bug. It created the patch race: faster discovery, faster releases, and slower human verification. Mastodon 4.6.2 was basically a one-line FFmpeg Dockerfile update. s.ee/5b6J #OpenSource #Security #Mastodon #AI

AI Did Not Create the Vulnerabilities. It Created the Patch Race.

Mastodon's FFmpeg-only 4.6.2 release shows the real AI-era security problem: patches now move faster than many operators can verify them.

s.ee

C.IM has been updated to Mastodon 4.6.1. This brings the Mastodon 4.6 profile redesign, Collections, email subscription support for public posts, stronger account/admin controls, longer alt text, and many fixes across the web UI, accessibility, ActivityPub, and backend behavior. Details: s.ee/mYNk

Mastodon Updated to 4.6.1

C.IM is now running Mastodon v4.6.1, bringing the Mastodon 4.6 profile redesign, collections, email subscription support, stronger account controls, and important fixes.

s.ee

Owl Owl OÜ @o.ee · 6mo ago

Our new Owl Owl OÜ website is live: o.ee It is now a clearer home for the services we run. Open-source, federated where possible, EU-hosted, privacy-first, with no ads or profiling. Thank you for supporting independent internet infrastructure.

Open-Source, Independent, Privacy-First Internet Services

Owl Owl OÜ operates C.IM (Mastodon), P.LU (PeerTube), R.NF (Lemmy), and Image.Hosting from the EU, with no ad business.

o.ee

C.IM has been updated to Mastodon v4.5.6. This release includes a security fix for ActivityPub collection caching along with improvements to quote posts, notifications, and connection handling. Read more s.ee/SzxZ

Mastodon Updated to 4.5.6 (February 9, 2026)

C.IM is now running Mastodon v4.5.6, a security and bug fix release addressing an ActivityPub caching issue, quote post improvements, and several backend fixes.

s.ee

Owl Owl OÜ @o.ee · 9mo ago

Mastodon 4.5.2 has been installed on C.IM. This update focuses on refinements and bug fixes, mostly around quoting, keyboard shortcuts, and UI behavior. Details: s.ee/cfju #Mastodon #CIM #Fediverse #Update

Mastodon Updated to 4.5.2 (November 24, 2025)

C.IM is now running Mastodon v4.5.2, a follow-up release focused on refinement and bug fixes, especially around quoting, UI behavior, and keyboard navigation.

s.ee

Owl Owl OÜ @o.ee · 9mo ago

Mastodon 4.5.1 is now live on C.IM. This is a major update that introduces quote posts, a redesigned composer, improved moderation tools, enhanced emoji rendering, better mobile behaviour, and many UI refinements. Full details are in our blog post: s.ee/tx3y #Mastodon #CIM #Update #Fediverse

Mastodon Updated to 4.5.1 (November 20, 2025)

C.IM has been updated to Mastodon v4.5.1, introducing major new features such as quote posts, improved moderation tools, customizable emoji rendering, and numerous fixes.

s.ee

Mastodon v4.4.8 is here — and we’ve already updated C.IM! This quick release fixes a quote control bypass vulnerability (GHSA-8h43-rcqj-wpc6). No new features this time, just important security hardening 🛡️ Read more on our blog: 👉 s.ee/pRxk

Mastodon Updated to 4.4.8 (October 22, 2025)

C.IM has been updated to Mastodon v4.4.8, a quick security release addressing a quote control bypass vulnerability.

s.ee

😂 Apparently, Mastodon decided to surprise us again — v4.4.7 dropped just a day after v4.4.6! We’re not exactly sure what bug they ran into, but it must’ve been something sneaky 🐛 Anyway, we’ve already updated C.IM so you’re running the latest and greatest. 👉 s.ee/qdA3

Mastodon Updated to 4.4.7 (October 15, 2025)

C.IM has been updated to Mastodon v4.4.7, bringing minor but important fixes for moderation emails, quote post handling, and referrer settings.

s.ee

🚀 C.IM has been updated to Mastodon v4.4.6! This release brings important security fixes, improved quote post handling, and several UI improvements. We’ve also added the new Bird UI — a sleek, Twitter-inspired theme you can enable in your appearance settings 🐦✨ Read more on our blog: 👉 s.ee/av6t

Mastodon Updated to 4.4.6 (October 14, 2025)

C.IM has been updated to Mastodon v4.4.6 with key security fixes, improved quote post handling, and a new optional Bird UI theme for a Twitter-like experience.

s.ee

🚀 We’ve upgraded P.LU to PeerTube v7.3.0! This release brings: ✨ Email translations ✨ A brand-new web configuration wizard ✨ Redesigned admin panel with customization tools 🐞 Plus many bug fixes & federation improvements 👉 Full changelog: s.ee/F54G

PeerTube Updated to 7.3.0 (October 3, 2025)

We’ve upgraded P.LU to PeerTube 7.3.0 with major new features including a web configuration wizard, redesigned admin panel, email translations, and important bug fixes.

s.ee

🚀 We’ve upgraded C.IM to Mastodon v4.4.5! This release brings security updates, bug fixes, and improved quote post handling. Read more in our blog post 👉 s.ee/Y9ME

Mastodon Updated to 4.4.5 (October 3, 2025)

C.IM has been updated to Mastodon v4.4.5, which includes security updates, fixes for out-of-order updates, and improvements to quote post handling. Read on for details.

s.ee

Owl Owl OÜ @o.ee · 11mo ago

📢 Our September donation report is now published. We’re truly grateful for your continued support 💜 👉 s.ee/Ls7p #Fediverse #Transparency #Donation

September 2025 Donation Report

A full transparency report for September 2025 donations and expenses across Owl Owl OÜ’s platforms.

s.ee

📢 We’ve published our August donation report. Thank you to everyone who supported us! 💜 👉 s.ee/NErz #Fediverse #Transparency #Donation

August 2025 Donation Report

A full transparency report for August 2025 donations and expenses across Owl Owl OÜ’s platforms.

s.ee

🚀 We’ve updated C.IM to Mastodon 4.4.3! This release includes security fixes, improved handling of quote posts, and accessibility improvements. As always, we stay up to date with upstream. 🔗 s.ee/FKdG #Mastodon #Fediverse #FOSS #CIM

Mastodon Updated to 4.4.3 (August 6, 2025)

C.IM has been updated to Mastodon v4.4.3, bringing key security patches, bug fixes, and quote post improvements. Read more about what’s changed.

s.ee

💡 July 2025 Donation Report We received €180 in donations for C.IM - thank you! 🙏 s.ee/PYRN Our total expenses were €693.36, leaving a deficit of over €500. If you enjoy our services, consider supporting us: o.ee/donate #Fediverse #Mastodon #PeerTube #Lemmy #Transparency

July 2025 Donation Report

A full transparency report for June 2025 donations and expenses across Owl Owl OÜ’s platforms.

s.ee

🚀 We’ve upgraded C.IM to Mastodon 4.4.2! This update includes security patches, Firefox UI fixes, and accessibility improvements. We've also upgraded TangerineUI and removed legacy themes no longer compatible with the latest version. 📝 Full details: s.ee/HnyV 💖 Support us: o.ee/donate/ #Mastodon

Mastodon Updated to 4.4.2 (July 24, 2025)

C.IM has been updated to Mastodon 4.4.2 with security updates, UI fixes, and upgraded custom themes. Learn more about what’s changed.

s.ee

🎥 P.LU has been upgraded to PeerTube 7.2.3! This update includes a key security fix. 🔒 We're committed to keeping our platform safe and stable. 📄 Read full changelog s.ee/vDwm #PeerTube #Fediverse #PLU #Update #OpenSource

PeerTube Updated to 7.2.3 (July 22, 2025)

We've upgraded P.LU to PeerTube 7.2.3 with important security and synchronization bug fixes.

s.ee

🔒 We’ve blocked major AI crawlers (like GPTBot, ClaudeBot, GoogleOther, MetaBot) across C.IM, P.LU, R.NF, and Image.Hosting. Your content belongs to you - not to AI training datasets. Full post 👉 s.ee/Agns #Privacy #Fediverse #Mastodon #PeerTube #Lemmy #Decentralization #AI

Blocking AI Crawlers to Protect User Privacy and Content Rights

Owl Owl OÜ now blocks AI bots from scraping content on C.IM, P.LU, R.NF, and Image.Hosting using Cloudflare protection to safeguard user privacy and copyrights.

s.ee

📢 P.LU has been upgraded to PeerTube 7.2.2! This update includes important security fixes, accessibility improvements, and a more stable video experience. 🛠️ 🔒 Reminder: All new accounts require a clear registration reason for approval. 🔗 Read full update s.ee/VqTX #PeerTube #PLU #Fediverse

PeerTube Updated to 7.2.2 (July 16, 2025)

P.LU has been upgraded to PeerTube 7.2.2 with better security, accessibility, and user experience. Learn more about the update and our registration policy.

s.ee

🎉 C.IM has been upgraded to Mastodon 4.4.1! ✔️ Remote quote post support ✔️ “Followers you know” widget ✔️ Improved performance with Vite 🛠️ Plus C.IM custom features: 5000-char toots, bigger uploads, and more! 🔗 Read full update s.ee/gMqH

Mastodon Updated to 4.4.1 (July 9, 2025)

C.IM has upgraded to Mastodon 4.4.1 with major new features, UI improvements, and updated custom functionality. Learn what’s new and what changed in this release.

s.ee