The best browser for a low-end PC or a 4 GB laptop

The best browser for a low-end PC is usually one you already have: Edge, Chrome or Firefox, with its tab-sleeping feature turned on and very few extensions. How many tabs and add-ons you keep open matters more than which browser you pick.

Last updated October 25, 2026 · Facts checked against Google, Microsoft and Mozilla support pages

The short version

All three main browsers can put tabs you aren’t using to sleep: Memory Saver in Chrome, sleeping tabs in Edge and tab unloading in Firefox.
On Windows 10, Edge has the clearest commitment: Microsoft says it will keep updating Edge on Windows 10 22H2 until at least October 2028. Google and Mozilla haven’t set an end date.
If you want the full uBlock Origin ad blocker, use Firefox. Chrome no longer runs it.
Closing tabs and removing extensions you don’t use does more than switching browsers.

Which browser should you use?

No browser is light in every situation. A browser’s memory use depends mostly on the sites you open and the extensions you add. Browser makers do publish their own comparisons, but they aren’t neutral, so we don’t repeat them here. Instead, pick based on the features below and on how long your browser will keep getting security updates.

On Windows 10 or 11, if you don’t have a strong preference: Edge. It’s already installed, it has sleeping tabs built in, and it has the longest documented support commitment for Windows 10.
If you use Google services and sync with an Android phone: Chrome, with Memory Saver turned on.
If you want strong ad blocking, or you use Linux: Firefox. Mozilla says most Linux distributions ship it as the default browser.

Memory-saving features in each browser

Chrome: Memory Saver

Settings → Performance

Memory Saver makes tabs you aren’t using inactive to free memory. They reload when you go back to them. Google offers three levels: Moderate, Balanced (the recommended one) and Maximum, which deactivates tabs soonest. On a 4 GB laptop, Maximum is worth trying.

If a site has to stay live, such as a music player or a web chat, add it to “Always keep these sites active”. Energy Saver, on the same page, cuts background activity when you’re on battery.

Edge: sleeping tabs

Settings → System and performance → Performance

By default, Edge puts background tabs to sleep after two hours of inactivity. You can shorten that time on the same settings page, and you can add sites that should always stay active. Edge’s energy saver (once called efficiency mode) puts inactive background tabs to sleep after 30 minutes or less.

Edge also has a performance detector, which flags background tabs using a lot of memory or CPU and offers to put them to sleep or close them.

Firefox: tab unloading

Automatic, plus about:unloads

Firefox unloads tabs on its own when the computer runs low on memory, to avoid crashing. It skips tabs that are playing media, using picture-in-picture or using WebRTC, such as a video call. To unload tabs yourself, type about:unloads in the address bar, or right-click a tab. The about:unloads page also shows how much memory each tab is using.

Windows 10 and older-Windows support

Windows 10 support ended on October 14, 2025. Your browser has its own schedule, and it’s the program that faces the internet most directly, so it matters. Companies update these statements, so check the linked pages if you’re reading this much later.

Browser	Windows 10	Windows 7, 8 and 8.1
Edge	Supported until at least October 2028 (version 22H2), with or without ESU	Ended with version 109
Chrome	Supported; Google lists the end date as “Not yet scheduled”	Ended with version 109
Firefox	Supported; Mozilla says any end date is “still several years away”	Firefox 115 ESR only, with security updates until March 2027
Brave	Supported; Brave requires Windows 10 or later	Ended

Chrome and Edge also need a processor that supports SSE3. If your PC can’t run Windows 10 or later, see our guide to Windows 10 end of support for your options, including Linux.

Ad blockers and Manifest V3

Chrome has switched extensions to a newer system called Manifest V3. Since Chrome 139 in July 2025, older Manifest V2 extensions are turned off and can’t be turned back on, and Google removed the last of them from the Chrome Web Store on August 31, 2026. The best-known casualty is the full version of uBlock Origin.

Chrome: use uBlock Origin Lite, the Manifest V3 version. Its developer says it can be less effective on sites that fight ad blockers.
Edge: Microsoft is phasing out Manifest V2 too. Its timeline has warnings appearing for some users from mid-September 2026, but no final cut-off date for home users yet.
Firefox: Mozilla says Firefox keeps supporting Manifest V2 and the blocking feature that full uBlock Origin relies on.
Brave: has its own ad and tracker blocking (Brave Shields) built in and turned on by default, so it doesn’t need an extension.

Habits that matter more than the browser

Keep fewer tabs open. Google’s own advice for a slow Chrome starts with closing tabs you aren’t using. Bookmark pages you want to read later instead.
Remove extensions you don’t use. Google suggests turning off extensions you don’t need to speed Chrome up. To find a troublesome one, turn them all off, then turn them back on one at a time.
Use the browser’s task manager. Press Shift+Esc in Edge or Firefox, or open Chrome’s menu → More tools → Task manager. Sort by memory to see which tab or extension is the problem. Ending a process loses unsaved work in it.
Run one browser at a time, and close other heavy apps while you browse.
Keep the browser updated. Updates fix security holes, and Google says Chrome works best on the latest version.

If you’ve done all this and the PC is still slow, it may simply need more memory or a faster drive. Our guides on how much RAM you need and speeding up an old laptop cover the next steps.

Frequently asked questions

Which browser uses the least RAM?

There’s no reliable, neutral answer that holds for everyone, because memory use depends on the sites you visit and the extensions you add. Any of Edge, Chrome or Firefox will use less with tab sleeping turned on, a handful of tabs and few extensions. Switching browsers without changing those habits rarely solves the problem.

Is Brave good for a low-end PC?

It can be. Brave has its own Memory Saver setting (under Settings → System → Performance), and blocks ads without an extension. It needs Windows 10 or later and a 64-bit processor.

Is Firefox a lightweight browser?

Firefox is a full-featured browser rather than a stripped-down one, but it does unload tabs automatically when memory runs low. It’s also the main browser that still supports the full uBlock Origin. On a 4 GB laptop it’s a sensible choice, especially on Linux.

What’s the best browser for a low-end PC on Windows 7?

Chrome and Edge stopped supporting Windows 7 with version 109. Mozilla keeps Firefox 115 ESR updated on Windows 7, 8 and 8.1 until March 2027 and will then re-evaluate. Windows 7 itself no longer gets security updates, so moving to Linux or a newer Windows is safer.