Is there an app/extension similar to The Great Suspender but for Safari? Safari is sucking wind lately, for me. I have a new 1TB hard drive in my system, put in Jan 2016. For Chrome I use Great Suspender extension - it halts tabs/sites after not being used for a while. Anything similar to this for Safari? Or any other suggestions to get Safari nice and zippy again? Thx.
Safari Extension called The Suspender by Brian Watkins

https://utahbrian.com/the-suspender/