Reproducible on Firefox 24, 25 and 26, on multiple OSs. Introduced with the fix for bug 879799. STR: 1. Launch Firefox. 2. Open the Browser Console. 3. Navigate through the console using the Tab button. On Windows and Ubuntu, Tab goes through the following in this order: Net, CSS, JS, Security, Logging, Clear, Input at the end of the dialog, logs, Filter. On Mac it goes: input at the end of the dialog, logs, Filter. When I focus one of the other items and I press Tab, the focus changes to nothing, then following Tab presses lead to input at the end of the dialog, logs, Filter. I'm not sure if nothing is correct here, but there is no item displayed as focused and nothing happens if I press Enter or Space.