Relevant information: I'm using Firefox My tablet has the latest driver installed My tablet works as expected on other Firefox apps, such as sketch.io I've tried restarting Firefox and disabling my extensions, neither of which affects the issue I've followed the troubleshooting guide , and Table on Tablet doesn't apply here (it's not a standalone tablet, it needs my desktop to function) With that out of the way, here are the issues: Issue 1: Windows Ink turned on. This causes the touch input to be ignored entirely; I can still draw by pressing a key on my pen that emulates a left mouse input, but touching the tablet doesn't do anything. Issue 2: Windows Ink turned off. This causes the touch input to register, but it never stops registering. If I take my pen off of the tablet and put it back on somewhere else, roll20 will draw a line between the two points (see the attached image). Furthermore, this isn't permanent. If I click anywhere else on the screen, the drawing will immediately vanish. However, if I instead use the left mouse input and just don't press on the tablet itself, it will work in the same way as (issue 1). Got any tips? I could just draw with a mouse, but it would be a lot easier if I could draw with a tablet.