Tab suspender Chrome: built-in vs extensions
If you're looking for a tab suspender Chrome can manage without another extension, start with Memory Saver. It deactivates eligible background tabs and reloads them when you return. Add a tab suspender Chrome extension only if you need a control Chrome does not offer, such as manual discard.
The main tradeoff is how the tab is suspended. Chrome and native-discard extensions leave the real tab in Chrome; placeholder extensions replace its page with one owned by the extension. That difference matters if you have a form open or later remove the extension.
Is Chrome Memory Saver enough?
For most people, yes: turn on Memory Saver first, choose a level, and exclude sites that must stay active. An extension earns its place if you need manual discard: Auto Tab Discard advertises that action alongside Chrome's automatic method and site exclusions. Auto Tab Discard, Chrome Web Store, checked October 2026
Memory Saver is under Settings → Performance. Chrome Help, checked October 2026, lists three levels: Moderate waits longer before deactivation, Balanced is recommended, and Maximum deactivates tabs sooner. These are relative policies, not a promise of RAM savings; Google Chrome Help, checked October 2026 publishes no savings figure.
Use this decision rule:
- Pick Balanced if you haven't tried Memory Saver before.
- Pick Maximum if tabs need to unload sooner and you're willing to revisit and reload them more often.
- Pick an extension only when you can name the missing control, such as manually discarding a tab.
How do I turn on Memory Saver, keep tabs active, and see memory use?
In Chrome 154 desktop, open More → Settings → Performance, turn on Memory Saver, and choose a level. Under Always keep these sites active, select Add and choose an open site or enter its address. Google Chrome Help, checked October 2026
Add google.com to exclude it and subdomains such as drive.google.com. The more specific .google.com pattern excludes the base domain but not its subdomains. Excluded tabs stay loaded and continue using memory.
Chrome may protect tabs with active audio or video, screen sharing, page notifications, downloads, partially completed forms, pinned tabs, or connected devices. If Memory Saver skips a tab, check these conditions before installing an extension. Google Chrome Help, checked October 2026
To see current Chrome tab memory usage on a Mac, open Settings → Appearance, enable Show memory usage on tab hover preview card, then hover over a tab (on Windows, Linux and ChromeOS the toggle is Show tab memory usage under Tab hover preview card). This isn't a measurement of the RAM Chrome will save by discarding it. Google Chrome Help, checked October 2026
What is the difference between frozen and discarded?
A frozen tab keeps its page loaded but pauses background work such as JavaScript timers and fetch callbacks. A discarded tab is unloaded from memory; its tab stays visible, but Chrome has to load the page again when you activate it. Chrome for Developers' Page Lifecycle API guide, checked October 2026 and Chrome's tabs API reference, checked October 2026 describe these states.
That reload is the cost to weigh. Page state held only in memory can disappear; the site must save it if it should return after a discard. Chrome says active forms and media can prevent Memory Saver from deactivating a tab, but don't treat that as a guarantee for every site or every kind of draft. Save work before manually discarding a page.
To inspect or test Chrome's behavior, enter chrome://discards in the address bar. The Chrome Discards page lists open tabs and lets you freeze or discard one. Activate a discarded tab to see it reload; developers can also check document.wasDiscarded after the page returns. Chrome for Developers' Page Lifecycle API guide, checked October 2026 documents the diagnostic page and flag.
Which tab suspender Chrome option should I choose?
Dates and versions below were checked October 4, 2026.
| Option | How it suspends | What you lose | If removed or restarted | Permissions | Last update checked October 2026 |
|---|---|---|---|---|---|
| Chrome Memory Saver Google Chrome Help, checked Oct 2026 | Chrome deactivates the page; the tab remains in Chrome and reloads on activation. Google Chrome Help, 2026 | In-memory page state may not return after reload; active media, downloads, partly filled forms and pinned tabs may be protected. Google Chrome Help, 2026 Page Lifecycle API, 2026 | No extension-owned URL to strand. Chrome's API says the discarded tab remains visible and reloads when activated; its discard guide does not promise restart recovery. Chrome tabs API, 2026 | No extension permission: this is a built-in Chrome setting. Google Chrome Help, 2026 | Chrome 154 was promoted to desktop stable Sep 22, 2026. Chrome Releases, 2026 |
| Auto Tab Discard Chrome Web Store, checked Oct 2026 | Calls Chrome's native chrome.tabs.discard; adds automatic/manual discard and host or regex exclusions. Auto Tab Discard source, 2026 Chrome tabs API, 2026 | Same reload tradeoff as native discard; page-only state can be lost. Chrome tabs API, 2026 Page Lifecycle API, 2026 | Native tab stays in Chrome rather than becoming an extension URL. Chrome's docs don't promise restart recovery; the extension's listing says discarded tabs are preserved when the browser is closed and reopened. Chrome tabs API, 2026 Chrome Web Store, Oct 2026 | Source manifest v0.7.4 lists idle, storage, contextMenus, notifications, alarms, scripting, and access to all HTTP/HTTPS sites; review Chrome's install prompt too. Auto Tab Discard manifest, 2026 | Chrome Web Store v0.7.4, updated October 4, 2026. Chrome Web Store, 2026 |
| The Marvellous Suspender (free, open-source) Chrome Web Store, checked Oct 2026 | A Great Suspender-based extension that replaces a page with a suspended page; its permission reference describes extension-page URLs. Chrome Web Store, 2026 TMS permissions, 2026 | The original page has been unloaded, so in-memory state is gone; restoring requires the extension's page to load the original URL. Page Lifecycle API, 2026 The Great Suspender recovery guide, checked 2026 | Higher risk: The Great Suspender's own recovery guide says its extension URLs can fail after uninstall. TMS stores session data and offers optional backups; unsuspend or back up tabs before removing any placeholder extension. The Great Suspender recovery guide, checked 2026 TMS permissions, 2026 | Required access includes open tabs, history, storage, scripting, and HTTP/HTTPS host access. Downloads and Google identity are optional, requested when enabling backup. TMS permissions, v9.x, checked 2026 | Chrome Web Store v9.0.3, updated Sep 17, 2026. Chrome Web Store, 2026 |
Is The Great Suspender safe to reinstall?
No. A project security issue reported that The Great Suspender's published build ran code fetched from a remote server. On February 4, 2021, another issue recorded a Chrome notice that the extension had been removed for malware. The security discussion and the removal report are in the project's issue tracker. Don't reinstall an old copy to recover tabs; use a current browser session backup or recover original URLs from your history.
Auto Tab Discard's source manifest asks for access to all HTTP and HTTPS sites. The Marvellous Suspender's permission guide explains why it needs tab, history, scripting, and site access, and which backup permissions it asks for only when enabled. Those disclosures let you judge whether the feature is worth the access; a Web Store listing or an open repository isn't a guarantee that future updates are risk-free.
What if you use a Mac and want browser-level hibernation?
If you're open to a different Mac browser, Octoweb's tab hibernation freezes background tabs under memory pressure and thaws them when you return, with an aggressive_hibernation option for tight RAM. Its palette shows open tabs' WebContent memory in MB. This isn't a RAM benchmark, and it doesn't establish that any browser will save a particular amount of memory.
I build Octoweb, so weigh that accordingly. It's a macOS browser. If you're comparing Mac browsers, see the Arc browser alternatives for Mac.
For Octoweb's scope and limits, see Introducing Octoweb, a WebKit browser for Mac.
Octoweb is free and open source, for macOS.
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