Browser: Google Chrome, Version 84.0.4147.105 (Official Build) (64-bit) Addons/Extensions: None Operating System: Windows 7 Javascript Enabled: Yes Anti-Virus: Kaspersky Steps to reproduce: Load Roll20. Click Journal Tab Open character Select Character Sheet At this point, the Charactermancer automatically loads up and I am taken to the step where I choose spells. Wait for the spells list to load Watching my RAM, I can see that Chrome memory usage creeps up to about 6.5GB, at which point the whole page goes blank with the message "SBOX_FATAL_MEMORY_EXCEEDED". Here is a video of the whole ordeal and the console log . Edit: I did upload the video in 1080, but Google has compressed it. :-(