Hello, I am experiencing an unwanted UI behavior in Firefox. When I select text on any webpage, Firefox displays a floating “Ask ChatGPT” bubble above the selected text. This happens regardless of the site. I want to disable this feature, but Firefox provides no setting or preference to do so. This is not caused by any extension. I verified this by checking about:addons, and I only have the following extensions installed: DuckDuckGo Privacy Essentials Firefox Translations Gibiru for Firefox None of them inject any ChatGPT functionality. I then opened about:config to disable the feature, but the usual preferences do not exist on my system. Keys such as: ui.textSelectEnabled browser.selection.menu.enabled browser.ml.chat.enabled browser.ml.chat.openai.enabled browser.ml.enabled are missing, and Firefox only shows the “add new preference” (+) icon. That means Firefox did not expose any toggles for this behavior. I am including a screenshot showing the unwanted “Ask ChatGPT” popup that appears when selecting text. I need instructions on how to permanently disable this text-selection popup, or confirmation on whether this is part of a controlled rollout or experiment that cannot be disabled on my version of Firefox. Thank you.