Google is facing yet another privacy-related lawsuit, this one alleging the company tracks users even after they opt out.

The lawsuit, filed in the US district court in San Jose, claims that Google uses Firebase to continue monitoring users and tailoring ads to them. Google’s Firebase is used for notifications, alerts, data storage, ads and tracking software glitches, as well as user interactions, such as clicks. Many developers use the tool in their apps.

According to Reuters, the lawsuit alleges that “even when consumers follow Google’s own instructions and turn off ‘Web & App Activity’ tracking on their ‘Privacy Controls,’ Google nevertheless continues to intercept consumers’ app usage and app browsing communications and personal information.”

The lawsuit also claims that Google uses Firebase to tailor its ads, effectively using it as an end-run around tracking. The firm filing the lawsuit is seeking class-action status.

This is not the only lawsuit Google is facing for ignoring opt-out settings. Earlier this year, Arizona Attorney General Mark Brnovich filed a lawsuit against the company for continuing to track users after they opt out.

Needless to say, this is not a good look for Google when the company is facing increased scrutiny in both the US and the EU for privacy issues and anti-competitive practices.