If Apple and Google don’t make it easier for users to discover third-party browsers, the companies will not have as much of a competitive need to improve Safari and Chrome.

They're accused of restricting developers from using different browser engines, keeping Google as the default search engine, and making exclusive financial deals.

Britain's antitrust regulator said its inquiry group had found the mobile browser market, dominated by Apple and Google, was not working well for consumers and businesses, supporting its decision to launch an investigation into the sector in January.