The security strategy director of Microsoft's Trustworthy Computing Group, Jeff Jones, claims that Mozilla has fixed more flaws in its browser than Microsoft during equivalent periods. That is apparently seen as evidence that Firefox is more vulnerable than IE:
"Since the release of Firefox 1.0 in November 2004, Mozilla has fixed 199 vulnerabilities in supported Firefox products — 75 high severity; 100 medium severity; and 24 low severity. In the same timeframe, Microsoft has fixed 87 total vulnerabilities affecting all supported versions of Internet Explorer — 54 high severity, 28 medium severity; and five low severity," said Jones.
Russian translation is here.
