Testing regarding Firefox's AI kill switch has shown that while generative AI features are disabled, telemetry and ad delivery remain active.
NewsMozillaAnthony Enzor-DeMeoFirefox
Firefox AI Kill Switch Does Not Disable Ads or Telemetry
This article is a translation. Read the Japanese original
Previous tests confirmed that data transmission and ad displays continue even when the switch is turned off. Some users had mistakenly believed that this switch served as a master toggle to disable AI, telemetry, and ads all at once.
Mozilla CEO Anthony Enzor-DeMeo stated in an essay published on August 25 that this switch could become the "most important AI feature."
According to Enzor-DeMeo, after assuming the role of CEO, the company prioritized building a switch that allows users to control AI rather than forcing AI features upon them.
Regarding actual usage, it was reported that approximately 1% of users have turned off all AI features, while only 3% have disabled individual features. He asserted that providing users with "choice and agency" would become a corporate strength.
Source: Firefox's AI Switch Is Off. Telemetry Isn't (Hacker News Frontpage, 2026-09-03)