Simple, recommended by Firefox [0], has light/dark theme [1], more customizable and pretty but not open source [2]. I've not used these extensively. [0] htt

Simple, recommended by Firefox [0], has light/dark theme [1], more customizable and pretty but not open source [2]. I've not used these extensively. [0] https://addons.mozilla.org/addon/dictionary-anyvhere/ [1] https://addons.mozilla.org/addon/english-popup-dictionary/ [2] https://addons.mozilla.org/addon/lumetrium-definer/