Cannot reach settings to choose input, therefore cannot use it. it's a pity, cause i've been successfully using it on opera and chrome. and it is fantastic there! the quality superb! I hope you can find the time and opportunity to fix it for Mozilla/Zen.
thank you for your great work!

doesn't work

Straight up doesn't work. Desktop app is fine but the author just refuses to merge in a fork that has basic quality of life features