How to Restore Previous Session Firefox (Tabs & Windows)

Closed Firefox by accident and lost all your tabs? Or did Firefox crash while you had an important browsing session open? Fortunately, Firefox has built-in session recovery features that can help you restore previous session Firefox, reopen closed tabs and windows, and recover Firefox tabs after a crash.

In this guide, you’ll learn how to restore your previous session in Firefox, reopen recently closed tabs and windows, restore Firefox tabs after a crash, and configure Firefox to automatically open your previous tabs whenever you start the browser.

Quick Answer: How to Restore Your Previous Firefox Session

1. Open Firefox.
2. Click the menu button (☰) in the top-right corner.
3. Select History.
4. Choose Restore Previous Session.

If that option isn’t there, Firefox may not have a restorable session saved — check Recently Closed Tabs or Recently Closed Windows from the same History menu instead. The full breakdown below covers every scenario in detail.

How to Restore Previous Session Firefox

If you closed Firefox (on purpose or by accident) and want all your tabs back, here’s the fastest way:

1. Open Firefox.
2. Click the menu button (the three horizontal lines in the top-right corner).
3. Go to History.
4. Click Restore Previous Session.

This instantly reopens all the windows and tabs you had open the last time you used Firefox. If you don’t see this option in the menu, jump to the “Why can’t I restore my previous session?” section below.

Read:- Reset Chrome Browser Settings

Keyboard Shortcut for Restoring a Session

There isn’t a single default keyboard shortcut that restores an entire session in Firefox, but you can reopen the most recently closed tab with:

• Windows/Linux: Ctrl + Shift + T
• Mac: Cmd + Shift + T

Pressing this repeatedly reopens tabs one by one, in the order they were closed — handy if you only need a couple of tabs back rather than your whole browsing session.

How to Reopen a Single Closed Tab in Firefox

Accidentally closed one tab instead of the whole browser? You don’t need to restore your entire session for this.

1. Right-click anywhere on the tab bar.
2. Select Reopen Closed Tab or Undo Close Tab.

Or simply use the Ctrl+Shift+T (Windows/Linux) or Cmd+Shift+T (Mac) shortcut mentioned above. Firefox keeps a history of your most recently closed tabs, so you can reopen several in a row.

How to Reopen a Closed Window in Firefox

If you closed an entire window (not just a tab), you can bring it back the same way:

1. Click the Firefox menu button.
2. Go to History.
3. Look for Recently Closed Windows and select the window you want to restore.

If you don’t see “Recently Closed Windows,” it usually means the window has already been cleared from memory — this can happen if you’ve since cleared your browsing history or restarted Firefox multiple times.

How to Restore Firefox Tabs After a Crash

When Firefox crashes unexpectedly, it’s designed to recover your tabs automatically the next time it opens.

1. Reopen Firefox after the crash.
2. You should see a “Restore Previous Session” page or a notification offering to reopen your tabs.
3. Click it to bring back your windows and tabs.

If that page doesn’t appear, use the same History > Restore Previous Session method described above — Firefox typically still has the crash session saved even if the automatic prompt doesn’t show.

Set Firefox to Always Restore Your Previous Session

If you want Firefox to automatically reopen your tabs every time you launch it — rather than starting with a fresh new tab — you can turn this on permanently:

1. Click the menu button and select Settings.
2. Stay on the General panel.
3. Scroll to the Startup section.
4. Check the box for “Open previous windows and tabs.”

From now on, closing and reopening Firefox will automatically bring back whatever you had open, without needing to manually restore anything.

Why Can’t I Restore My Previous Session in Firefox?

If “Restore Previous Session” is missing from your History menu, it’s usually one of these reasons:

• You’re in Private Browsing mode — Firefox doesn’t save session data during private sessions.
• You cleared your browsing history — clearing history often wipes session data too, depending on what was selected.
• Too much time has passed — session data can be overwritten after multiple new sessions.
• “Open previous windows and tabs” is already enabled in Settings — if Firefox is set to always restore your last session automatically, the manual option sometimes won’t appear because it’s already been used on startup.

Which Restore Method Should You Use?

Match what happened to the right fix:

What If Firefox Won’t Restore Your Previous Session?

If none of the options above bring your tabs back, resist the urge to keep closing and reopening Firefox — doing so can overwrite the session data Firefox needs for recovery, making it harder to get your tabs back. Instead, check each of these in order first:

1. History > Restore Previous Session
2. History > Recently Closed Tabs
3. History > Recently Closed Windows
4. Your regular browsing History (search for the page by name or URL)

If the tabs still aren’t showing up anywhere, Firefox likely no longer has enough session data to restore them automatically — at that point, checking History for the individual pages is your best bet.

How to Avoid Losing Firefox Tabs Again

The simplest safeguard is turning on Open previous windows and tabs under Settings > General > Startup, as covered earlier. Beyond that, it’s worth bookmarking anything genuinely important rather than relying on session restore alone — session recovery is a convenience feature, not a guaranteed backup, and it can fail after repeated crashes or a cleared history.

Get a Warning Before Closing Multiple Tabs

You can also have Firefox ask for confirmation before it closes a window with several tabs open, so you don’t lose a whole browsing session with one accidental click:

1. Open Firefox and type about:preferences in the address bar, then press Enter.
2. Stay on the General tab.
3. Scroll to the Tabs section.
4. Enable “Confirm before closing multiple tabs.”

With this turned on, Firefox will show a warning prompt any time you try to close a window with multiple tabs open, giving you a chance to cancel before they’re gone.

Final Thoughts

Losing a browser full of tabs feels a lot worse than it actually is — Firefox almost always has a way to bring them back, whether you closed the browser on purpose, lost a single tab, or had it crash mid-session. If you find yourself restoring sessions often, turning on “Open previous windows and tabs” in Settings is the easiest way to make sure you never have to think about it again.