Here is how to increase your browser's performance if you have a graphic card.
First go to your windows display settings.
In display settings, find graphics settings.
Select your browers and change the graphic options to high performance
If you are using an Nvidia graphics card, right click on the Nvidia icon on the bottom right corner of your screen and select Nvidia control panel.
In manage 3D settings, select your browser, and change the preferred graphics processor to High performance Nvidia processor and click apply.
These should help you improve the performance of your browser.
However, if you have a 4K and above monitor, it might be a good idea to not maximize your browser, as the resolution of the game scale with your browser size.
We hope this is going to help you eliminate any issues you have when playing on the browser, and we welcome any feedback you have!