The Internet Defence League (IDL) claims that 9.2 million web users joined its protests against US surveillance schemes on Independence Day.
The organisation asked people to demonstrate their anger with the US National Security Agency (NSA) and its PRISM snooping programme, while numerous high-profile sites such as Mozilla, Wordpress and Reddit joined in the event.
In an email statemnt, the organisation confirmed that huge numbers of people had joined the protests, underlining the extent of feeling over the revelations.
"In the wake of shocking revelations about sweeping NSA surveillance, the IDL - a coalition of thousands of websites that formed after the Internet Blackout against SOPA - and hundreds of sites, organisations and internet users have organised the largest online protest since the SOPA blackout," it said.
"Thousands of people attended Restore the 4th street actions that happened around the [US] and tens of thousands more rallied on the web calling for an end to unconstitutional government spying."
Tiffiniy Cheng of the IDL said it was vital people made sure their voices were heard in the fight for web freedoms.
"The NSA programs that have been exposed are blatantly unconstitutional, and have a detrimental effect on free speech and freedom of press worldwide. This is going to be our biggest protest since SOPA, and it should be no surprise," she said.
"You can’t disregard people’s privacy, invade their personal lives on a daily basis, and not expect them to fight back.”
The protests come as issues around the PRISM and Tempora spying programmes continues to dominate the headlines, with politicans such as Neelie Kroes warning that the concerns could hit US and UK cloud firms as customers leave in their droves.
Some providers in other territories such as Switzerland have said they are already seeing more interest in their services from firms looking to ensure they avoid the prying eyes of government spooks.
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