Try installing with the driver only option for the latest adrenalin drivers.
Try disabling hardware acceleration in the browser, do you have multiple monitors while gaming, if so try switching the others off or lowering their hz to 60.
Some people have even ran ram memory tests to check the stutters are not that. Try running dpi latency tool and see if anything else in the system is causing high latency.
Some people have tried slightly under voting their gpus to try and increase stability as a kind of last resort option and found this helps. Or bringing down the core clock a tad with same voltage.
Trying out older drivers from last year is another option,
Psu wattage,
Try disabling g sync, that doesn't sound ideal but could've worth a try,