Google users are concerned about their browsing privacy after a recent update at Google secretly logs Chrome browser users into their online Google accounts, syncing data without asking, a move one expert says has “enormous implications for user privacy and trust.”

As detailed by cryptographer and professor Matthew Green on his blog on Sunday, Google made the change several weeks ago.

“Due to Chrome’s new user-unfriendly forced login policy — I won’t be using it going forward,” declared professor Green. “A few weeks ago Google shipped an update to Chrome that fundamentally changes the sign-in experience. From now on, every time you log into a Google property (for example, Gmail), Chrome will automatically sign the browser into your Google account for you. It’ll do this without asking, or even explicitly notifying you.”

“Your sole warning — in the event that you’re looking for it — is that your Google profile…