Same problem with 75hz. I have already written 3 times in AMD Issue Reporting Form since the release of the video card. They seem to ignore this problem ...
AMD focused only on the performance of the cards and not repairing drivers, I wait a week for the graphics card I send to the store and after 12 years I will buy NVIDIA
They apparently fixed a few issues with 9.9.2 drivers, might want to give this a shot and report back:
Just got a Gigabyte 5700XT Gaming OC, DDU the old driver, downloaded 19.9.2, Chrome still crashes with HW acceleration. Have to disable it. At this point, what is the most stable drivers for 5700?
EDIT: I rolled back back to 19.7.5 according to a Reddit thread. Doesn't seem to crash Chrome with HW acceleration on.
So far so good with the 9.9.2 drivers. Enabled hardware acceleration on Firefox and Chrome and had videos running on YouTube all day simultaneously on both browsers with no crashes. I'll report back in about a week. Fingers crossed.