As long as I can remember, the timeline used on the "Other browsers" page has been broken. In Edge, it doesn't display the actual graphics, only the lines until you go into full screen mode, while in Firefox, the timeline doesn't take the full width of the available space. And in both Firefox and Edge, after going into full screen mode, leaving it again will cause the timeline to remain its full screen width, breaking the page.
As long as I can remember, the timeline used on the "Other browsers" page has been broken. In Edge, it doesn't display the actual graphics, only the lines until you go into full screen mode, while in Firefox, the timeline doesn't take the full width of the available space. And in both Firefox and Edge, after going into full screen mode, leaving it again will cause the timeline to remain its full screen width, breaking the page.