This is because Mozilla has announced that Firefox users will now be able to delete collected data on themselves. This is part of the California Consumer Privacy Act (CCPA) which went into effect on the 1st of January, 2020 which is essentially the US equivalent of Europe’s GDPR privacy policy.
Mozilla notes that they already collect very little information on its users, and that the data they collect is “telemetry” data, meaning that this data is basically used to improve the performance and security of Firefox. However, the company notes that if users are still uncomfortable with them collecting it, they can go ahead and delete it.
“We’ve decided to go the extra mile and expand user deletion rights to include deleting this telemetry data stored in our systems. To date, the industry has not typically considered telemetry data ‘personal data’ because it isn’t identifiable to a specific person, but we feel strongly that taking this step is the right one for people and the ecosystem.”