Firefox – Useful Extensions
uBlock Origin – HTML / Adblock third party reference blocker
AutoHiDPI – Auto Hi DPI – scaling for Retina displays
!!!!*** Has some stability issues (Firefox 41, although reports go back as far as Firefox 38 with different equipment and distros) … settings do not hold through system restarts, and occasionally turn off when restarting Firefox. See Firefox about:config seach pixel – adjust layout.css.devPixelsPerPx from 1 to 1.5
FT DeepDark Theme – matching to Gnome3 dark theme