How Mirror webpages as Web Video Wall into another browser?

We have a video wall with some monitors. each one is plugged into a Raspberry PI 3.

Mostly we just are showing webpages into the video wall (reports, status etc) Today we control the content of each raspberry using VNC. I was wondering if is there a web service or plugin that allows me to just configure the URL that I wish to show on each screen. Plus, Sometimes we split the each screen into 2 or more webpages.

Is there any web app, chrome plugin or web service that allows me do that?

Thanks

OBS, I don't know if here is the right place to this kind of question. If is there another community where i could ask this, i will be glad to know.