Slashdot tells us that a new “AI-bloat feature” of Firefox 141 blows up CPU and energy usage referring a neowin.net article that luckily offers an easy solution: disabling it. Here’s how:

you can disable them through the browser’s advanced settings. Head to about:config in a new tab, accept the risk warning, and use the search bar to find the controls. To kill the AI chatbot feature, search for browser.ml.chat.enabled and set it to false. To stop smart tab grouping, search for browser.tabs.groups.smart.enabled and set it to false.