Planning to move full time to safari from Brave which has built-in tab suspension. I keep a lot of tabs open and tab suspension helps with memory/battery. I didn’t see this any explicit setting in safari. Does safari support tab suspension? Any extension that does it?
I think the OS will suspend ‘automatically’… in Activity Monitor, you will see that Safari has “App Nap = yes”, you could expand the toggle and see all the tabs and whether they have App Nap or not, but I don’t think you can individually turn it on or off.
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Where is this, don’t see it in macOS activity monitor?
Under Energy tab.
(20 character)
Yes, that column shows App Nap.
As to how it works and how long it takes, I have no idea.
In typical apple way, they just make sure that Safari is efficient in terms of energy consumption (not sure about benchmarks, but I would say it wins over Chromium based browsers) and that’s all, there are no visible tweaks to be done by the user.
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Based on my non-scientific experience, for people who are tab hoarders I think that Chrome variants with excellent tab suspension run circles around Safari in terms of system resource usage.
You can have 100 tabs in various states of suspension in Chrome without the system being overloaded. If you have those same 100 tabs in Safari, my experience is that Apple will optimize the efficiency of each loaded tab, but not the efficiency of the browser as a whole.
I have seen cases where Safari will have a message at the top of the page stating something like this page is using significant energy. But I really like to leave it to Apple to manage all this - I doubt I will individually suspend a tab.
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I am able to use three different operating systems at the same time, but 100 open browser tabs? Never came close.
(@webwalrus, perhaps, just perhaps, I could see a use case for a web developer like you. 
)
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Fwiw, I find Vivaldi’s saved sessions a much better solution for returning to groups of tabs than dealing with the clutter of leaving a bunch of tabs and windows open that I’m not using at the moment.
Yeah, I remember seeing that. Firefox seems very efficient and fast these days, and updates download and install noticeably faster than Chromium and even Safari updates on a Mac.
I’d never seen this feature, actually. So I’m playing with this now, and it doesn’t seem to work properly with workspaces. I’ll tell it to open an 8-tab session, and it opens 7 tabs in the current window + 1 in the new window.
I’d love for this to be rock-solid, as it would save me a ton of hassle. 
Huh. I’ve never had an issue with saved sessions in Vivaldi. I suggest asking about it in their forum. It’s a pretty friendly company and community.
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