I can't scroll around the map in Firefox 64.0 64-bit
A detailed description of the issue:
I join my game as DM. The page loads. I scroll around to find my players' tokens. I can scroll for a few seconds, then the scrolling stops. Whatever was on the VTT at that time stays there as I continue to scroll.
As I continue to scroll around, I get a little movement (about an inch) at the very end of the stroke, vertically and horizontally.
My macros still work. The zoom bar still works, but zooming gives inconsistent results.
If I switch to a new map, the whole VTT just goes gray. Sometimes I see part of the previous map tab.
The game works fine on Chrome.
Launching another game, for example, Underworld Speculation, that works fine in Firefox.
Web Browser: Firefox
Browser Version: 64.0 64-bit
Operating System: Ubuntu 18.04
If Javascript is enabled: Yes
Your anti-virus software: none
List of any browser add-ons or extensions enabled: none
Cookies enabled, Flash not installed, 1920x1080 screen resolution, 24 bit color depth
Looking at the console output, when the scrolling freezes, this error shows up:
IndexSizeError: Index or size is negative or greater than the allowed amount app.js:111
e.Lamp.prototype.castlight https://app.roll20.net/assets/app.js:111:3013
E/< https://app.roll20.net/assets/app.js:344:2912
forEach self-hosted:262:13
k.forEach https://app.roll20.net/assets/base.js:6:1626
E https://app.roll20.net/assets/app.js:344:1
P https://app.roll20.net/assets/app.js:344:6835
R https://app.roll20.net/assets/app.js:344:5950
d20.canvas_overlay.postProcessing https://app.roll20.net/assets/app.js:344:6048
d20.engine.postProcessing https://app.roll20.net/assets/app.js:344:31485
renderAll https://app.roll20.net/assets/app.js:339:32724
renderAll self-hosted:973:17
d20.engine.renderLoop https://app.roll20.net/assets/app.js:346:14132
