Hope you're not affected by the infamous MBP GPU plague. I have had the internal GPU permanently disabled on mine (GPUmux), which leaves only onboard Intel GPU

Hope you're not affected by the infamous MBP GPU plague. I have had the internal GPU permanently disabled on mine (GPUmux), which leaves only onboard Intel GPU (garbage)... so my affected MBP also does not load the webpage. Dual Xeons with RX580 doesn't break a sweat — about 20% GPU load.