Duelingbook keyboard shortcuts for people that hate clicking on small buttons.
Examine dbshortcuts.js to see the supported shortcuts.
Go to edge://extensions, then enable Developer Mode, and if you do, click on Load Unpacked (on the Extensions tab) pointing it to the directory where this has been downloaded. After testing, disable Developer Mode.
Go to about:debugging, then click on Load Temporary Add-on... (on the This Firefox tab) pointing it to the directory this has been downloaded.
Go to chrome://extensions, then enable Developer Mode, and if you do, click on Load Unpacked pointing it to the directory this has been downloaded. After testing, disable Developer Mode.