Firefox has crossed to the dark side.
"You guessed it: looks like it's a so-called AI."
"People are noticing Firefox gobbling extra CPU and electricity, apparently caused by an 'inference engine' built into recent versions of Firefox."
The Register: Some users report their Firefox browser is scoffing CPU power https://www.theregister.com/2025/08/13/firefox_ai_scoffing_power/ @theregister @lproven#Firefox#Mozilla#AI