Description of problem:

In Firefox the terminal shows "sometimes" a border on the bottom which was not displayed in Chrome.

The line was not shown in an understandable rule. Initial it looks like a focus but it could not reproduced with any click in the terminal field. It is sometimes missed also if the user can type something.

Prerequisites (if any, like setup, operators/versions):

Steps to Reproduce

1. Switch to developer perspective and add a Deployment to start a Pod
2. Select your deployment in topology and select the running Pod
3. On the Pod details page switch to the "Terminal" tab
4. Switch the focus between terminal field, the "Connecting to" Dropdown and other fields in the browser.

Actual results:

1. When the terminal has the focus Firefox shows a bottom border line.

Expected results:

1. Similar look and feel to other browsers. Don't expect any bottom border line here.

Reproducibility (Always/Intermittent/Only Once):

Intermittent

Build Details:

1. Latest 4.8 console master (tested with 4c443747272cd262ebc0e8d35491a0363af3c02c)

Additional info: