Collected research

I know what you've got (Firefox Extensions)

Jeremiah Grossman · blog.jeremiahgrossman.com

Building on RSnake's chrome: protocol finding, Grossman ships working detection for installed Firefox extensions: create an IMG object per signature pointing at a chrome:// icon unique to that extension, and an onload handler names the ones present. Includes a table of roughly 47 extension-to-URL signatures and live proof-of-concept code.

Record

Researcher

Jeremiah Grossman

Published by

blog.jeremiahgrossman.com

Topic

Browser

In the archive

• Collected in the 2006 research round

Tags

• browser-extension
• detection
• browser-fingerprinting
• javascript
• dom
• info-leak
• prior-art-extension
• owasp-a09-2021

This page is the archive's own catalogue record. The research is the work of Jeremiah Grossman, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on 10 August 2026.