LONDON, Sept 24 (Reuters) - Google's online

advertising practices face renewed scrutiny in Britain, after

the competition watchdog said on Tuesday that "concerns remain"

over the company's plans to retain third-party cookies as part

of its Chrome browser.

In July, the tech giant scrapped longstanding plans to

remove cookies, the tiny packets of code that track users across

the internet, from Chrome. Advertisers, the company's biggest

source of revenue, complained the move would limit their ability

to personalise ads, leaving them dependent on Google's own user

databases.

In an attempt to appease critics, Alphabet-owned Google said

users would be given the choice to allow cookies to track them

when browsing with Chrome.

Following the reversal, the Competition and Markets

Authority (CMA) invited stakeholders to share their views on the

decision.

"Based on careful consideration of the responses we

received, the CMA's view is that competition concerns remain

under Google's revised approach," the CMA said in a statement

posted on online on Tuesday.

It added: "If the CMA is not able to agree changes to the

commitments with Google which address the competition concerns,

then the CMA will consider what further action may be

necessary."

Google did not immediately respond to a request for comment.