Recente antwoorden op How to hide menu bar white lineshttps://support.mozilla.org/nl/questions/12343442018-09-18T02:54:17-07:00try to change the theme.
2018-09-18T02:54:17-07:00FFus3rhttps://support.mozilla.org/nl/questions/1234344#answer-1155784<p>try to change the theme.
</p>