<rdar://problem/64729871>

I forgot to mention that the behavior works as expected if you leave Safari and System FKA defaults to off. However, the test case is broken if you enable either of the following: - SysPrefs > Keyboard > Shortcuts > Use keyboard navigation... - Safari Prefs > Advanced > Press Tab to highlight... In any case, elements with tabindex="-1" should not appear in the tab loop.

Thanks for cutting this bug, James :) Just wanted to add some notes from my initial testing, where "buttons" is <button> elements, checkboxes is <input type="checkbox">, and links are <a href> 1. System FKA ON, Safari FKA ON, JS OFF - Tabbing skips the grid entirely - From a focused cell, tab visits buttons and checkboxes, and links 2. System FKA OFF, Safari FKA ON, JS OFF - Tabbing skips the grid entirely - From a focused cell, tab visits buttons and checkboxes, and links 3. System FKA ON, Safari FKA OFF, JS OFF - Tabbing skips the grid entirely - From a focused cell, tab visits buttons and checkboxes, not the links 4. System FKA OFF, Safari FKA OFF, JS OFF - Tabbing skips the grid entirely - From a focused cell, tab visits nothing

Bumping this up since this can be reproduced on any product page on the Apple.com store that uses the Buy Flow Evolution design (e.g., iPhone). Each heading has tabindex="-1", so each are focused when tabbing through with FKA enabled. I haven't seen it mentioned yet for iOS, but this was raised for FKA on iOS in Safari. I am also able to reproduce in iOS 17 beta 3 Safari.