Facebook (FB) - Get Report and Amazon.com  (AMZN) - Get Report are part of more than two dozen U.S. technology firms that urged Congress today to reform an internet surveillance law, arguing that it was essential in improving privacy protections and heightening government transparency, Reuters reports.

The request is the first influential public initiative by Silicon Valley to voice its stance regarding the Foreign Intelligence Surveillance Act, parts of which will expire on December 31 unless reauthorized by Congress.

A primary concern to the tech industry is a section of the measure that would give U.S. intelligence agencies access to vast amounts of communications from foreigners but also incidentally collect some data belonging to Americans that can be searched without a warrant.

"We are writing to express our support for reforms to Section 702 that would maintain its utility to the U.S. intelligence community while increasing the program's privacy protections and transparency," the companies wrote in a letter.

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