The groups, which analyzed the social network's new terms of service and data policy at the request of Belgium's Privacy Commission, say Facebook is placing too great a burden on its users.
The preliminary results of a European Union investigation sound like tax trouble is brewing for Amazon.
Privacy watchdogs in Europe say the controversial ruling, which affects only local European versions of Google's search engine, should be applied more broadly.
The United States Mission to the European Union says antitrust issues should not be "politicized."
Across much of Europe, people embarrassed by certain search results can prod Google and other search engines to clean things up.
European Union and Chinese government strike a deal to end an investigation into whether Chinese telecom equipment makers, including Huawei and ZTE, received illegal subsidies.
European Union officials contend that a Luxembourg ruling from 2003 could represent an improper tax shelter and thus require Amazon to pay back taxes.
The European Commission's competition regulator says something looks fishy in "selective" treatment of Apple by Irish authorities, and he wants answers.
Amid a tangle with EU regulators over how it displays search results, Google gets into a war of words with Rupert Murdoch's media giant.
After three previous settlement attempts, regulators say formal objections are the "logical next step" if the two sides can't come to an agreement.