The U.S. Congress takes up the issue on Tuesday of yet another area where big tech firms in this case, Amazon.com and Alphabet’s Google dominate, this time in smart home devices where they battle smaller companies like speaker maker Sonos Inc.

The hearing takes place at a time of extraordinary interest in tougher antitrust enforcement, much of it focused on the biggest U.S. technology companies. One result has been a series of investigations and several federal and state lawsuits filed against Google and Facebook as well as a long list of antitrust bills.

Senator Amy Klobuchar, who chairs the antitrust subcommittee, is hoping to act before the existing tech giants, in this case Amazon and Google, establish themselves as unassailable.

In the smart speaker market, she cited data that showed that Amazon was at 53 percent market share while Google was at 31 percent.

“This is an area where we can look forward and see around the corner and not just respond years later,” she said, noting that people are buying everything from smart speakers to smart door locks and more. “We know that this is a growing market.”

Smart home technology can be smart speakers like Amazon’s Echo or Google’s Nest, security systems or televisions.

Witnesses will include Ryan McCrate, Amazon’s associate general counsel, and Google Senior Public Policy Director Wilson White, along with Sonos Chief Legal Officer Eddie Lazarus.

Last year, Sonos CEO Patrick Spence told a congressional committee that Google and Amazon used their dominance of search and online retail, respectively, to subsidize the smart speaker market and, potentially, dominate the market for other smart home devices.

FedEx Corp and robotics company Nuro on Tuesday announced a multi-year agreement to test self-driving vehicles in the package delivery company’s network, starting with a pilot program in Houston.

The partnership comes as parcel companies race to reduce the cost of last-mile delivery, which surged during the pandemic.

The companies will target delivery scenarios where Nuro’s low-speed, unmanned vehicle can provide “the biggest bang for your buck,” Cosimo Leipold, Nuro’s head of partnerships, told Reuters in an interview.

That will likely include inefficient tasks like late-night pickups in out-of-the-way places, said Rebecca Yeung, FedEx vice president for advanced technology and innovation.

“Instead of dispatching a driver to get those packages, a device like Nuro could be super helpful,” said Yeung, who called the FedEx/Nuro tie-up a “very serious, long-term commitment” that aims to reduce headaches, not human drivers.

Nuro vehicles are already making deliveries for U.S. supermarket operator Kroger Co and Domino’s Pizza Inc in the Houston area. Nuro continues to test its technology in Arizona.

Nuro, whose R2 unit has space for delivery cargo but not a human driver, said last year it has raised $500 million.

In a separate project, FedEx is using DEKA Research & Development Corp’s smaller robot, dubbed “Roxo,” for on-demand, same-day deliveries in Plano, Texas.

Rival United Parcel Service Inc is centering its unmanned delivery efforts on drones.

UPS has ordered electric delivery vans from British startup Arrival. Those vehicles are fitted with sensors and cameras that should gradually enable autonomous features, but will still require a human driver.

Transporting people via self-driving taxis is proving more difficult and expensive than delivering packages and food. As a result, freight and logistics companies are exploring ways to roll out the technology on predictable and simple routes, including on highways.

Britain’s competition watchdog said it would investigate whether Apple and Google’s dominance of mobile phone operating systems, app stores and web browsers hurt consumers, launching its latest probe into the tech giants.

The Competition and Markets Authority said it would undertake a “market study” into the matter to see whether the pair’s effective duopoly was stifling competition and ripping off consumers, or hurting businesses like app developers.

Governments around the world are looking at strengthening the regulation of U.S. tech giants that have become even more powerful during the pandemic, and there are multiple investigations globally into their market positions including in the United States and the European Union.

Britain is setting up a dedicated unit within the CMA to keep the tech giants in check and encourage digital competition but said it needed to start work probing iPhone maker Apple and the Google-powered Android system as soon as possible.

“Our ongoing work into big tech has already uncovered some worrying trends and we know consumers and businesses could be harmed if they go unchecked,” CMA chief executive Andrea Coscelli said in a statement on Tuesday.

The CMA said the new study into mobile ecosystems would be broader than some of the other competition probes it already has into Apple’s App Store and Google’s Privacy Sandbox.

Last year, the CMA concluded an investigation into digital advertising, concluding that Google and Facebook have developed unassailable market positions, with the two accounting for nearly 80% of UK’s digital advertising spend. It recommended regulatory changes as a result.

Facebook and other Silicon Valley giants could face more scrutiny and potential sanctions in the European Union after the bloc’s top court backed national privacy watchdogs to pursue them, even when they are not the lead regulators.

Consumer lobbying group BEUC welcomed Tuesday’s ruling by the EU Court of Justice (CJEU), which backed the right of national agencies to act, citing enforcement bottlenecks.

“Most Big Tech companies are based in Ireland, and it should not be up to that country’s authority alone to protect 500 million consumers in the EU,” BEUC Director General Monique Goyens said after the judgement.

Along with Google, Twitter and Apple, Facebook has its EU headquarters in Ireland, putting it under the oversight of the Irish data protection regulator under privacy rules known as GDPR, which allow for fines of up to 4% of a company’s global turnover for breaches.

The CJEU got involved after a Belgian court sought guidance on Facebook’s challenge to the territorial competence of the Belgian data watchdog, which was trying to stop it from tracking users through cookies stored in the company’s social plug-ins, regardless of whether they have an account or not.

“The BE DPA (Belgium’s data watchdog) now needs to analyse the judgment in more details to determine whether any of the situations described … apply to the case it has opened against Facebook in 2015,” Hielke Hijmans, Chairman of the Belgian Data Protection Authority’s Litigation Chamber, said.

Several national watchdogs in the 27-member EU have long complained about their Irish counterpart, saying that it takes too long to decide on cases. Ireland has dismissed this, saying it has to be extra meticulous in dealing with powerful and well-funded tech giants.

Ireland’s cases in the pipeline include Facebook-owned Instagram and WhatsApp as well as Twitter, Apple, Verizon Media, Microsoft-owned LinkedIn and U.S. digital advertiser Quantcast.

“Under certain conditions, a national supervisory authority may exercise its power to bring any alleged infringement of the GDPR before a court of a member state, even though that authority is not the lead supervisory authority,” the CJEU said.