With the introduction of chrome and edge ver. 114, the popover API which allows previously hidden content to be toggled in-and-out of view.
This functionality is usually implemented with 3rd party JS libraries like Popper.js which are quite popular, even attracting sponsorships from companies like Twitch and Microsoft
As of now, Firefox on ver. 113 does not have any support, full or partial for this API; and over the coming weeks and month the usage for 3rd party JS libraries is likely to decline due to this functionality already being baked into rendering engines.