I can't play Roblox Unblocked

I am currently using a Dell Inspiron 15 5580 running Windows 11 and have encountered performance issues when attempting to play Roblox. Because the game was previously restricted on my device, I am using the Roblox unblocked method from Infrexa via this page: https://ncert.infrexa.com/now-gg-roblox-login-and-gameplay-roblox-unblocked

While the game successfully opens, my laptop begins to exhibit abnormal behavior after only a few minutes of gameplay; the system fan becomes extremely loud, the chassis gets very hot, and the browser tab becomes slow or entirely unresponsive. Upon checking Task Manager, I noticed that memory usage spikes to nearly 100%, leading to significant in-game lag and occasional system freezes despite having few other programs open.

I am seeking advice from other Inspiron 15 5580 users or experts to determine if these issues are related to harware or specific driver conflicts on Windows 11, or if the hardware is simply being overwhelmed by the Roblox unblocked browser instance. Any suggestions regarding cooling optimizations, or memory management for this Dell device model would be greatly appreciated.