It might not be a record they wanted to set though you have to be impressed, the Skype toolbar single-handedly crashed 33,000 Firefox instances.  Even worse, the way it detected phone numbers was having a large detrimental effect on performance in general.  According to Ars Technica, for two weeks Mozilla tried to get someone at Skype to repair the problem for before opting to disable the add-on.  It is not uninstalled, just disabled so you can turn it back on if the new found speed and stability of Firefox disturbs.
“Mozilla announced yesterday that it will block the Skype Toolbar add-on for Firefox and remotely disable it for existing users. Mozilla was forced to take this extraordinary measure after discovering that severe bugs in the add-on are crippling the browser’s performance and stability.”

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