So Chromium Browser is nice and fast but what turned me off was the fact that it didn't fit in with the rest of my desktop so I went on a mission to figure out how to make it fit in...
Open up Configure your Desktop - Workspace Appearance and Behavior - Window Behavior - Window Rules
Then click new on the left side
In the pop up click on Detect Window Properties. Then Click on an open Chromium Window. When a window pops up just hit ok.
Change the Description to Chromium Browser.
Now change to the Preferences Tab. And Check the No Border box and change it to force but make sure the box to the right is unchecked.
Then when that is done click ok then apply.
Now in chromium right click next to your tabs and tell it to use System Titlebars and borders then exit out of chromium for now.
After that is done open chromium back up and download this extension https://chrome.google.com/extensions/detail/hhdcpgghmjfomnkdeikoahadbejhfkmh
It's the Oxygen theme extension. It doesn't fit well with the Oxygen window theme but it fits in perfectly with the Nitrogen Window Theme.
If you followed the directions right you should end up with this
Like I said it goes perfectly with the Nitrogen Window Decoration....
Nitrogen also fits in very well with other gtk apps..