In that case, there are some extensions that sleep tabs, and you can use about:memory to figure out which ones are the leakers. Maybe the Firefox crew could fig

In that case, there are some extensions that sleep tabs, and you can use about:memory to figure out which ones are the leakers. Maybe the Firefox crew could figure out how to build this in, it's definitely a case where Chrome's policy means that websites might not fix their leaks because they don't cause problems in Chrome.