[Affected versions]: Firefox DevEdition 52.0a2 (2017-01-19) Firefox Nightly 53.0a1 (2017-01-19) [Affected platforms]: Mac OS 10.12 Ubuntu 16.04 [Steps to reproduce]: 1. Make sure you are not connected to any Wi-Fi or wan. Start latest FF, with clean profile. 2. Enable Wifi and search and try to connect to a Captive portal Wi-Fi network. (don't finish connecting to it:-> do not input u/p) 3. After focusing FF, by using keyboard only, press tab until you manage to focus the Captive Portal Notification tab. [Expected result]: The Captive Portal Notification tab is focused. [Actual result]: The Captive Portal Notification tab can't be focused. If I continue pressing "TAB" I see that also close button and "Show Login Page" button can't be focused. Please note that I tested this scenario on Ubuntu 16.04 and in this case everything can be focused except the close button "x".

(In reply to ovidiu boca[:Ovidiu] from comment #0) > Please note that I tested this scenario on Ubuntu 16.04 and in this case > everything can be focused except the close button "x". Update on the above with keyboard only I can focus: -windows 10: notification, ShowLogin button, close button - Ubuntu 16.04: notification, ShowLogin button

Mass wontfix for bugs affecting firefox 52.