Description of the issue:
Video playback jerks on cbs.com.
Does not happen on YouTube.
Shields up, shields down, doesn’t matter.
Hardware acceleration on or off doesn’t help.
Does not happen immediately, but typically after a few minutes. Once it starts, it can stutter every few seconds. Audio stutters at the same time.
Video playback on CBS is fine in Chrome.
Videos should play cleanly with at least one of those shields / hardware acceleration options, since they do in Chrome.
macOS 10.13.6 (17G6030)