Firefox lagging and high CPU spikes when managing e-commerce backend tools

Hi Mozilla Support Team, I am experiencing severe browser lag and high CPU usage on Firefox specifically when managing complex backend forms and inventory management scripts on our e-commerce operations portal. The page script execution freezes when opening multiple tabs alongside developer console tools. I have already cleared cache and disabled third-party extensions, but memory leaks still happen during heavy DOM rendering. Is there a specific setting in about:config or hardware acceleration flag recommended for heavy web app environments? Thanks!