The HTML Standard section on Custom Handlers describes the procedure to register custom protocol handlers for URLs with specific schemes. When a URL is followed, the protocol dictates which part of the system handles it by consulting registries. In some cases, handlers may fall to the OS level and and launch a desktop application (eg. mailto:// may launch a native application) or, the browser may redirect the request to a different HTTP(S) URL (eg. mailto:// can go to gmail).
Protocol Handler Registration via Browser Extensions – make everything intensely
Custom URL schemes have traditionally served as an integration bridge between the browser and external capabilities. Schemes such as mailto: and tel: allow navigation to trigger actions beyond ordinary HTTP resource retrieval. The HTML Standard formalizes this mechanism through the Custom Scheme Handlers API, which enables websites to register themselves as handlers for specific URL schemes.
AT Protocol Handler - Chrome Web Store
AT Protocol utilities: handle tools, post filtering, PDS info.
AT Protocol Handler – Get this Extension for 🦊 Firefox (en-US)
Download AT Protocol Handler for Firefox. AT Protocol Handler This extension lets you handle and open at:// URLs seamlessly in your browser by listing compatible sites. Originally developed for Chrome, this version supports Firefox with full protocol handler integration.
AT Protocol Handler – Get this Extension for 🦊 Firefox (en-US)
Download AT Protocol Handler for Firefox. AT Protocol Handler This extension lets you handle and open at:// URLs seamlessly in your browser by listing compatible sites. Originally developed for Chrome, this version supports Firefox with full protocol handler integration.
Introduction to Google Chrome Extensions
at://wormhole - Chrome Web Store
Open at:// links or the active tab URL in various AT Protocol tools and Bluesky clients.
Stop Ignoring the Browser: The Biggest Frontend Shift in a Decade
Native browser APIs now provide powerful alternatives for routing, state management, and components. Never mind the frameworks, use the browser.
substandard - Chrome Web Store
Detect and subscribe to standard.site publications on the AT Protocol.
WebMCP | AI on Chrome | Chrome for Developers
WebMCP has two APIs that allow browser agents to take action on behalf of the user.
web-app-launch/launch_handler.md at main · WICG/web-app-launch
Web App Launch Handler. Contribute to WICG/web-app-launch development by creating an account on GitHub.
Forget the Fate of Chrome, Focus on the Fate of the Browser
In debating what undoubtedly won't happen, we're looking past some key things that are -- and might...
How Chrome tracks you and how to limit it | Proton
Learn how Chrome tracks your activity, what information it sends to Google, and which privacy settings can reduce tracking while you browse.
Important piece of multi-protocol support in browsers! Thanks to much work from Javi, and funding from @ipfs.tech. HEY NOW, settle down - a ways to go: - can only redirect to URLs/paths - no Safari - off by default in Chrome (for now) - only allow-listed schemes unprefixed Step by step...
Javier Fernandez
Blog post about a new Chromium feature I've been working on to allow Web Extensions register protocol handlers just declaring them in the Manifest. blogs.igalia.com/jfernandez/2026/03/24/protoco…
Manifest-declared protocol handlers just landed (behind a flag) in Chrome 146 🎉 This is how ipfs:// or atproto:// can become first-class citizens of the browser! The web that's coming is built on keys, hashes, and verifiable data. Browsers need to meet it there. ipfsfoundation.org/protocol-handler-registration…
Protocol Handler Registration in Chrome 146 and the Browser as OS
ipfsfoundation.orgcorkiejp.github.io/ATProtocolHandler/index.html Features:- AT Protocol utilities: handle tools, post filtering, PDS info. Stores:- chromewebstore.google.com/detail/foippfcmhngnjdlfhgaifp… | addons.mozilla.org/en-US/firefox/addon/at-protoc… github.com/corkiejp/corkiejp.github.io/t… Supported clients: - 'wsocial.eu', 'bsky.app', 'mu.social', 'deer.social', 'blacksky.community', 'northsky.app' bsky.app/profile/did:plc:qxlh6bohvep3t…
What if a browser could navigate #ATProto DIDs and 🦋 Bluesky handles? Made a little prototype of Aura, a browser that can navigate between standard websites (🌐), Bluesky handles (@), and permanent DIDs, resolving them all in the same address bar.
