The caret has not correct position

[armanforghani]

As you can see in the screenshot, the caret has not correct position. I'm using Firefox 45.0.1.

[stenza]

also in Firefox 49.0.2

[frkinta]

Same issue on FF 51.0.1

[kybarg]

Sorry, don't have time to maintain repos I don't use in ,y projects anymore. But I can make PR if you suggest any. Thank you.