Get the Whitepaper called Exploiting Cross Context Scripting in Firefox.
You can download it from the following link: https://packetstormsecurity.com/files/download/88813/Exploiting_Cross_Context_Scripting_vulnerabilities_in_Firefox.pdf
Source: https://packetstormsecurity.com/files/88813/Exploiting-Cross-Context-Scripting-Vulnerabilities-In-Firefox.html