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I recall there was a bug in Firefox from years back where JS could be used to infer what addons were installed. Typically it just pinged some extension URIs to
by sysadm1n 5y ago
I recall there was a bug in Firefox from years back where JS could be used to infer what addons were installed. Typically it just pinged some extension URIs to look for an extension's presence. If it HTTP 200 OK'd then you had it installed. That bug has been fixed IIRC.