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Firefox can restore windows and tabs that were open the last time you used it. Learn how to use and configure it.

Firefox can restore all windows and tabs that were open when it was last closed or terminated unexpectedly. This article describes the circumstances under which Firefox will restore your previous session and how you can configure it. {note}'''Note:''' Session Restore may keep you logged in to sites that you were logged in to before you closed Firefox. For more information, see [[#w_privacy-issues|Privacy issues]].{/note} __TOC__ =When session restore occurs= ==When you select Restore Previous Session from the Firefox menu== Here's how to get your tabs and windows from a previous session back using the Firefox menu: #Click the menu button [[Image:Fx89menuButton]] on the right side of your toolbar. #Click {menu History} and then select {menu Restore Previous Session}.<br><br>[[Image:Sessionrestore89]] ==After a Firefox update== To apply any updates to the Firefox application that have been downloaded, you must restart Firefox. To restart, click {button Restart to update Firefox}. {for win}[[Image:Fx70aboutFirefox-Restart]]{/for}{for linux}[[Image:fx70Linux-AboutFirefox-Restart]]{/for}{for mac}[[Image:Firefox 70 MacOS Restart to update]]{/for} ==After restarting Firefox in Troubleshoot Mode== When you [[Diagnose Firefox issues using Troubleshoot Mode|restart in Troubleshoot Mode to diagnose Firefox problems]], your tabs and windows will be reopened. ==After a crash== Due to unexpected issues such as problems with a website, software errors, or an accidental loss of power, Firefox may unexpectedly close. In these situations, Firefox can restore the pages that you were visiting when it is restarted. Firefox will automatically restore your previous session, the first time you launch it after a crash. If Firefox crashes a second time, the ''Restore Session'' page will appear when you next launch Firefox. [[Image:Fx97RestoreSession]] *To restore the previous session, select the windows or tabs you want to restore and click {button Restore Session}. *If Firefox continues to experience errors when windows and tabs are reopened, you can launch Firefox without restoring these items. To start a new session, click {button Start New Session}. ==When you've set Firefox to restore the previous session at startup== You can set Firefox to always show your windows and tabs from your previous session each time you start Firefox. To change your Firefox startup settings, see [[#w_configuring-session-restore|Configuring session restore]] below. =Configuring session restore= When Firefox starts, a single window is opened by default, displaying your [[How to set the home page|specified home page]]. If you wish, you can configure Firefox to open the windows and tabs from your previous session: #[[T:optionspreferences]] #Select the {menu General} panel. #Below '''Startup''' select {menu Open previous windows and tabs}<br>[[Image:Fx94settings-Startup]]. #[[T:closeOptionsPreferences]] =Privacy issues= Session Restore may keep you logged in to sites that you were logged in to before you closed Firefox. If someone else used your computer after you, they could access your account on these sites. If this is a concern then you should not configure Firefox to open all windows and tabs from your previous session. You may also wish to disable the Session Restore crash recovery feature which is enabled by default. This will prevent restoring a previous session when Firefox is opened after an unexpected close or software crash: [[Template:aboutconfigwarning]] #[[T:aboutconfig]] #In the ''Search preference name'' box at the top type '''browser.sessionstore.resume_from_crash'''. #Click the ''Toggle'' [[Image:Fx71aboutconfig-ToggleButton]] button next to {pref browser.sessionstore.resume_from_crash} to set it to {pref '''false'''}. =Troubleshooting= ==Previous session not correctly closed== To get your tabs and windows back from a previous session, you should close Firefox from the menu: [[T:closeFirefox]] If you close each window or tab, only the tabs in the final window that you close are available when you restart Firefox. ==Settings may be incorrect== For other session restore problems, you may need to make corrections to your Firefox settings: #[[T:optionspreferences]] #Select the {menu Privacy & Security} panel. #In the '''History''' section make sure that the '''Firefox will''' drop-down menu is set to either {menu Remember history} or {menu Use custom settings for history}. #*If '''Firefox will''' is set to {menu Use custom settings for history}, then make sure that '''Always use Private Browsing mode''' is '''not''' checked. #*If '''Firefox will''' is set to {menu Use custom settings for history} and '''Clear history when Firefox closes''' is checked, then click the {button Settings} button and make sure that '''Browsing & download history''' is '''not''' checked. #[[T:closeOptionsPreferences]] <!-- MZ credit --> <br><br> '''''Based on information from [https://kb.mozillazine.org/Session_Restore Session Restore (mozillaZine KB)]'''''