AdGuard is the best new AdBlocker that we are now using.

https://chromewebstore.google.com/detail/adguard-adblocker/bgnkhhnnamicmpeenaelnjfhikgbkllg

One way to get into Chromebook settings is at the top off this group.

I was just telling someone in another group how to hear sound on the web pages and mp4's that you visit.

FIRST: At the top of a group.

https://www.geocities.ws/bkbrat/ClickFirst.png

That will take you to your Site Settings.
Where you go down to Sound.

https://www.geocities.ws/bkbrat/SiteSetting.png

Sound must be set to Allow. Automatic Default is not good enough to hear sound on everything or place you click.
You choose Allow from the little drop down box.

https://www.geocities.ws/bkbrat/Allow.png