Must have been some kind of race condition thing. For some reason, when tabbed to, Firefox would see those values and instantly jump the page up, even though the focus style moved it back into a normal place. I “hid” it by doing a position: absolute top: -9999px left: -9999px thing (old muscle memory), then removing those values when in focus. See that “Skip Results Iframe” link that shows up when tabbing through the CodePen Embed? It only shows up when :focus-ed (as the point of it is to skip over the rather than being forced to tab through it). Once you have, then you can tab to things you’d expect to be able to tab to, like links.Ībout that bug with the scrolling to the top of the page. If you have to turn that on, you also have to restart Firefox. System Preferences > Keyboard > Shortcuts > User keyboard navigation to move focus between controls It was like some elements you could tab to but not others? You can tab to s but not s? Uhhhhh, that doesn’t seem right that you can’t tab to links in Firefox?Īfter searching and asking around, it turns out it’s this preference at the OS level on macOS. So, I went to go debug the problem by tabbing through an example page in Firefox, and this is what I saw: Someone reported to me that when tabbing to a certain element within a CodePen embed, it shot the scroll position to the top of the page (WTF?!). I just had to debug an issue with focusable elements in Firefox.

Mozilla mac