Transform the x-system into characters as you type! Works on Duolingo!
Don't have a keyboard that supports accented characters, like 'ĝ'? Don't worry!
Esperaboard converts x-system Esperanto, like 'gx', into the accented characters, like 'ĝ', as you type. It works on Duolingo and many other websites!
Click on the icon to enable/disable it, and right-click to open settings.
Source code: https://github.com/nebrelbug/esperaboard