To anyone with uBlock Origin, you can use Dynamic Filtering (available when you check the "I am an advanced user (required reading)" option on the uBlock Origin settings menu) to greenlight requests from cdn.playwire.com if you're getting a grey screen on Neopets games if the standard enable Flash method doesn't work. Here's the guide for to enable Dynamic Filtering on uBlock Origin. I'll post a step-by-step process on how I did it for those having the grey screen error on Neopets games cau