Version 145.0.1. It's a helpful feature I'm sure for some users to be able to drag a tag onto another tag and have it auto-create a group for you. However I have been dragging tabs to reorganize their order in the window my whole life. Now, they are all of a sudden creating tab groups. Example (one of many) I order my amaz*n shopping tabs by item price to compare. I would like to turn this "drag to create tab group" OFF (back to the old behavior). Please don't get confused: there's a new feature detailed in the blog: https://blog.mozilla.org/en/firefox/tab-groups-updates/ which is dragging onto a GROUP. I am NOT asking about that. I'm asking about dragging one tab on top of another which are NOT YET IN A GROUP and having firefox CREATE a NEW group. In about:config searching for "drag" the only things I can see are browser.tabs.dragDrop.createGroup.delayMS 240 browser.tabs.dragDrop.expandGroup.delayMS 350 browser.tabs.dragDrop.moveOverThresholdPercent 80 browser.tabs.dragDrop.pinInteractionCue.delayMS 500 browser.tabs.dragDrop.selectTab.delayMS 350 But I can't make any sense of those.