autoplay
You can also stop videos from playing automatically in Facebook News Feed.
You can turn off Facebook video autoplay settings on or off if you want to stop videos from playing automatically on your Windows computer:
Click Settings > Click Videos > Autoplay Videos Drop-down Menu > Select Off.
For Safari (macOS High Sierra):
1. When on website make a right-click the URL area and select option "Settings for This Website"
2. In appeared dialog box hover the cursor to "Auto-Play"
3. In menu choose preferable option: "Allow All Auto-Play", "Stop Media with Sound", "Never Auto-Play".
