Google agreed Wednesday to make “significant” changes to the way its search function operates in Europe to settle EU complaints that it was squeezing competitors out of searches, avoiding further legal action and billions of euros in fines.

“We will be making significant changes to the way Google operates in Europe,” company spokesman Kent Walker said.

The European Commission, which has been investigating Google since 2010, said the company “has now accepted to guarantee” that when it displays its own specialised search services, it will also display those of three rivals in the same way to users.

The deal ensures that Google “provides users with real choice between competing services presented in a comparable way; it is then up to them to choose the best alternative”, EU Competition Commissioner Joaquin Almunia said.

“I believe that the new proposal obtained from Google after long and difficult talks can now address the Commission’s concerns,” he added.

The changes are aimed at resolving one of the key complaints of competitors – including US tech rival Microsoft – that Google displayed its own services more prominently, putting other firms at a serious disadvantage.

“We have been working with the European Commission to address issues they raised and look forward to resolving this matter,” Walker added.

Rival companies will be invited to comment on the proposal before the Commission takes a decision on whether to make it legally binding on Google.

Almunia said he did not expect this to change his position.

“I do not see why I would change my mind … I think we have solved the case,” he told a press conference.

Competitors unconvinced

Industry group ICOMP said Google’s commitments should be reviewed by an outside third party so as to establish their real effectiveness.

“Without a third party review, Almunia risks having the wool pulled over his eyes by Google,” said David Wood, ICOMP’s legal counsel.

Market tests of Google’s two previous offers “demonstrated their fatal flaws and the Commission rightly rejected them” Wool said in a statement.

“Why has Almunia chosen to ignore the expert advice of the market on this occasion?” the statement asked of the new deal.

Another industry group, FairSearch, made similar points, saying acceptance of Google’s proposal “is worse than doing nothing”.

But the Commission agreed that Google had made “significant concessions” to meet competition concerns.

Content providers such as TripAdvisor or price comparison sites such as Twenga and Foundem can now refuse, without being penalised, to allow the use of their content in Google’s specialised search services.

It will also remove exclusivity requirements in its agreements with publishers for the provision of search advertisements, and it will remove restrictions on the ability for search advertising campaigns to be run on competing platforms.

The Commission will name an independent trustee to ensure Google sticks to its commitments in the five-year accord, which is designed to allow for technological change and innovation, Almunia said.

The EU and Google exchanged a series of proposals last year in the case but each time they were found wanting.

If found at fault in an EU anti-trust probe, a company risks a fine equal to up to 10 percent of annual sales, worth nearly $60 billion last year for Google.

Google accounts for about 70 percent of the search engine traffic in the United States and 90 percent in Europe.

In January 2013, US authorities absolved Google of anti-competition practices in a similar case.