dpkg-reconfigure tzdata
ar x dpkg_1.17.23_amd64.deb tar -zxf data.tar.gz (or tar -xf data.tar.xz)
Add this file to handle dark themes with Firefox :
cat ~/.mozilla/firefox/randomName.default/chrome/userContent.css input:not(.tactile-searchbox-input):not(.urlbar-input):not(.textbox-input):not(.form-control):not([type='checkbox']) { -moz-appearance: none !important; background-color: white; color: black; } #downloads-indicator-counter { color: white; } textarea { -moz-appearance: none !important; background-color: white; color: black; } select { -moz-appearance: none !important; background-color: white; color: black; }