Re: [w3c/clipboard-apis] Standardize Clipboard Source url (Issue #244)

tanu18 left a comment (w3c/clipboard-apis#244)

This behavior already exists today—browsers include provenance metadata (source URL) in the clipboard using vendor-specific MIME types like Chromium Internal Source URL or text/x-moz-url-priv, and sometimes even inside the HTML clipboard format as an optional SourceURL header. 
Our proposal doesn’t introduce a new concept; it simply standardizes the name and format so it’s consistent across browsers. The standardized MIME type would not be exposed to web developers via Clipboard APIs—it’s intended for platform-level applications (e.g., security tools) to make informed decisions.
Standardization improves interoperability, reduces fragmentation, and provides clearer privacy guidelines without increasing exposure, since this mechanism already exists today.

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Received on Tuesday, 2 December 2025 04:33:04 UTC