Brave Nightly Browser Consuming a lot of resources on laptop Build # 78.0.72.90

Hello All:

The over the last few weeks my Brave Browser has been taking up a lot of resources on my laptop, at times as high as 48% and has made my laptop (Lenovo Yoga 720) extremely lagging and non responsive at times. When I keep Task Manager open I see 14 instances of the browser open but really only have 1 window. I try to close some of the tasks and when I get to about 7 news ones start to open up again and then i get slammed with heavy lag. Any fixes?
Thanks, Rich