Chrome vs Firefox vs Edge RAM Usage: 2026 Test Results
Does Firefox use less RAM than Chrome? In our May 2026 loaded-tab test, yes. Firefox used less memory than Chrome at 30 and 50 loaded tabs. Chrome was lighter at idle, and Edge stayed close at low tab counts, so treat these numbers as one controlled test, not a universal browser ranking.
| Browser | Idle | 10 tabs | 30 tabs | 50 tabs | Best for |
|---|---|---|---|---|---|
| Firefox | 727 MB | 2,782 MB | 4,515 MB | 8,844 MB | Lowest RAM with many loaded tabs |
| Chrome | 612 MB | 2,730 MB | 5,632 MB | 14,414 MB | Tab groups, extensions, Google workflows |
| Edge | 1,211 MB | 2,561 MB | 7,797 MB | 14,611 MB | Vertical tabs and sleeping tabs |
Does Firefox Use Less RAM Than Chrome?
Yes, in our loaded-tab test. Firefox used less RAM than Chrome at 30 tabs and 50 tabs. Chrome was slightly lower at idle and nearly tied at 10 tabs. A light browsing day and a fully loaded work session can point to different winners.
Test Setup
Test date: May 4, 2026
Device: M4 Pro Mac
Profiles: Fresh profiles without extensions
Workload: The same sites at idle, 10, 30, and 50 fully loaded tabs
Measurement: Total resident memory across browser processes
Memory features: The test measured loaded tabs. Chrome Memory Saver, Edge sleeping tabs, and Firefox unloading can change results after tabs become inactive.
Why This Comparison Matters
If you work with a lot of tabs every day, the browser is not a neutral choice. Chrome, Firefox, and Edge handle tab-heavy sessions in noticeably different ways. That starts with memory use, but it also shows up in grouping, restore behavior, and the small tab tools you end up relying on after lunch.
We tested all three browsers with identical workloads: the same sites, the same number of tabs, and fresh profiles without extensions. This is not a general browser comparison. It is about tabs: how each browser groups them, restores them, and keeps them from eating the whole machine.
Native Tab Grouping
Tab grouping clusters related tabs under a named, color-coded label in the tab bar. Simple feature, big difference once a window turns into a workbench.
Chrome
Chrome added tab groups in 2020 and has refined them since. Right-click any tab to create or join a group. Groups can be named, colored (8 color options), collapsed with a single click, and moved between windows. Chrome also supports saved tab groups that persist across sessions. Some users report saved groups disappearing or not restoring as expected, so treat saved groups as useful organization, not a full session backup.
Chrome now has native vertical tabs. Google announced the feature on April 7, 2026, and users can right-click a Chrome window and choose "Show Tabs Vertically" when the feature is available in their browser.
Chrome's tab groups also have the broadest third-party extension support. Tools like TabGroup Vault can save, restore, and back up tab groups because Chrome exposes tab group data through its extension APIs.
Firefox
Firefox now has built-in desktop tab groups, starting with Firefox 141 for all users. Groups are local only and do not sync with Firefox Sync.
Firefox's container tabs feature also allows tabs to be isolated by identity (work, personal, banking). This is useful for privacy and account separation, but it is separate from project-style tab grouping.
Edge
Edge, being built on Chromium, inherits Chrome's tab group feature with similar right-click grouping, colors, and collapse behavior. Edge also has vertical tabs built-in, displaying your tabs in a sidebar instead of a horizontal bar. Edge's vertical tab implementation remains the longer-running version, but Chrome's native vertical tabs now cover the same basic layout.
| Feature | Chrome | Firefox | Edge |
|---|---|---|---|
| Native tab groups | Yes (full) | Yes (desktop, Firefox 141+) | Yes (full, same as Chrome) |
| Group colors | 8 colors | Limited / theme-dependent | 8 colors |
| Collapse groups | Yes | Yes | Yes |
| Saved groups | Yes (built-in) | Local only, no Firefox Sync | Yes (built-in) |
| Vertical tabs | Yes (native, rollout may vary) | No (extension only) | Yes (built-in, more polished) |
| Tab search | Ctrl+Shift+A | Ctrl+Shift+Tab (list) | Ctrl+Shift+A |
Browser RAM Usage Comparison 2026
Memory efficiency matters most when the tab count stops being theoretical. We tested each browser at idle, 10, 30, and 50 loaded tabs on May 4, 2026, then measured total resident memory across browser processes.
| Scenario | Chrome | Firefox | Edge |
|---|---|---|---|
| Idle | 612 MB | 727 MB | 1,211 MB |
| 10 tabs | 2,730 MB | 2,782 MB | 2,561 MB |
| 30 tabs | 5,632 MB | 4,515 MB | 7,797 MB |
| 50 tabs | 14,414 MB | 8,844 MB | 14,611 MB |
Firefox used less memory than Chrome and Edge at the 30-tab and 50-tab checkpoints. The 10-tab result was close enough that extensions, page mix, and browser settings matter more than the browser name. If you're sticking with Chrome and want to cut its memory usage, see our guide on 10 fixes for Chrome using too much memory.
Edge used slightly less memory than Chrome at 10 tabs in this run, but it was heavier at 30 and 50 loaded tabs. Edge's sleeping tabs can still help after tabs sit inactive, while Chrome's Memory Saver can produce different results once background tabs are discarded.
Context Matters
Memory usage changes a lot based on the sites you keep open. These benchmarks use a standardized mix on one M4 Pro Mac. Your own numbers will move if you run heavy web apps, media-heavy sites, extensions, Memory Saver, or sleeping tabs.
Session Restore and Saved Tabs
Session restore matters, but it should not outweigh the RAM result here. Chrome and Edge can reopen previous tabs when configured to continue where you left off, and Firefox can restore previous sessions too. The practical risk is simple: a restored session is not the same thing as a deliberate backup of the work you meant to keep.
For Chrome specifically, some users report saved tab groups disappearing or not restoring as expected. That does not prove a single technical cause, but it is enough reason to avoid treating browser-native saved groups as your only record of important research or projects.
| Restore Feature | Chrome | Firefox | Edge |
|---|---|---|---|
| Basic tab restore | Reliable | Supported | Reliable |
| Tab group restore | User-reported complaints | Newer, local only | User-reported complaints |
| Scroll position | Varies | Varies | Varies |
| Form data | Varies | Varies | Varies |
| Crash recovery | Automatic | User-selectable | Automatic |
Extensions and RAM
Tab and session managers can reduce memory pressure when they help you close, save, suspend, or reopen tabs instead of keeping every page loaded. That is secondary to the RAM comparison, so this article does not rank OneTab, Session Buddy, Workona, Toby, or Tab Manager Plus.
Chrome and Edge are the cleanest fit for TabGroup Vault because they expose native tab group data to extensions. Firefox 138 added WebExtensions support for manipulating tab groups, including grouping and ungrouping tabs, but Firefox's user-facing tab groups and extension ecosystem still work differently from Chrome's.
| Ecosystem Factor | Chrome | Firefox | Edge |
|---|---|---|---|
| Extension role in this comparison | Save or close inactive tab groups | Supplement native groups | Use Chrome-compatible tools |
| Tab group extension support | Full | Available for group/ungroup APIs | Full (same as Chrome) |
| TabGroup Vault available | Yes | No | Yes (via Chrome store) |
| Best use here | Backup and restore groups | Extra organization tools | Backup groups plus sleeping tabs |
Built-In Performance Features
Each browser now has built-in tools for keeping background tabs under control.
Chrome: Memory Saver
Chrome's Memory Saver can deactivate inactive tabs to free memory. It has Moderate, Balanced, and Maximum levels, and users can keep specific sites active when those sites should not be deactivated. Some activity and settings can prevent deactivation, and some users report inconsistent sleeping behavior, so Memory Saver is useful but not guaranteed to unload every inactive tab.
Firefox: Tab Unloading
Firefox can unload inactive tabs to save memory, and Firefox 140 added direct tab unloading from the tab right-click menu. Unloaded tabs reload when you revisit them. Lower memory now, a short wait later.
Edge: Sleeping Tabs
Edge's sleeping tabs feature is enabled by default. It uses heuristics to avoid sleeping tabs that are doing useful background work, such as playing sound, showing video, or handling notifications. Handy for everyday memory savings, but not every background tab will sleep on the same schedule.
TabGroup Vault: The Extension Layer
Works with: Chrome and Edge (Chromium-based browsers)
What it adds: Save tab groups as persistent snapshots, restore on demand, back up to Google Drive
Why it matters: Built-in features unload or sleep some tabs. TabGroup Vault lets you close saved groups entirely and restore them later.
Price: Free (5 snapshots) / $29 one-time Pro
The Verdict: Which Browser Is Best for Tabs?
There is no single winner across every category. The better choice depends on the kind of tab mess you create.
Choose Chrome if:
- You rely on tab groups as part of your daily workflow
- You want the widest selection of tab management extensions
- You use Google Workspace and benefit from Chrome's deep integration with Google services
Choose Firefox if:
- Memory efficiency matters more than extension choice
- You want lower RAM in heavy loaded-tab sessions like this test
- Privacy features like container tabs matter to your workflow
- You are comfortable with Firefox's newer tab groups and do not need Chrome's saved-group ecosystem
Choose Edge if:
- You want Chrome's tab groups plus built-in vertical tabs
- You prefer sleeping tabs enabled by default with minimal configuration
- You want access to Chrome extensions while using Edge's sleeping-tab and vertical-tab defaults
- You work in a Microsoft-centric environment
Our Take: Browser Matters Less Than Strategy
The clearest result is that Firefox used much less RAM than Chrome and Edge with 30 and 50 loaded tabs in this test. That matters if you keep large sessions fully loaded. Still, all three browsers improve when you reduce active tab count, and both Chrome and Edge can look better once Memory Saver or sleeping tabs has time to deactivate background pages.
The real performance gains come from habits: grouping tabs, saving inactive groups, closing what you do not need right now, and restoring on demand. On Chrome and Edge, TabGroup Vault supports that workflow with native tab group snapshots. On Firefox, native groups and unloading help, though saved groups are local only and do not sync through Firefox Sync.
For more on tuning Chrome, see our guides to fixing Chrome using too much memory and reducing Chrome memory without losing your tabs. For the technical reasons browsers get heavy, read why browsers slow down with too many tabs.