It would be good to make this an in-built feature that you can toggle in your preferences, or perhaps just bring in the extension for use. Personally I would love it to be an in-built feature.
For those that have never used the extension it basically turns off a tab after a certain amount of time in order to save RAM and bandwidth. If the tab has something running though like you’re writing something or a video is in the middle of playing then it won’t suspend; however, this isn’t always the case. You can also whitelist sites as well as pause the extension.
A very useful function for people that use a lot of tabs.