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فائر فاکس ری سیٹ کریں – آسانی سے سب مسائل کو ٹھیک کریں۔

اگرآپ کے فائر فاکس میں کچھ مسائل آ رہے ہیں تو اسے ری سیٹ کرنے سے وہ ٹھیک ہو سکتے ہیں. ری سیٹ فیچر آپ کی ضروری معلو مات جیسے کہ بک مارکس اور کھلے ٹیبز کو محفوظ کرتے ہوئے فائر فاکس کو فیکٹری ڈیفالٹ حالت میں لے آتا ہے جس سے بہت سے مسائل ٹھیک ہو جاتے ہیں۔.

فائر فاکس کو اس کی بنیادی حالت میں لائیں۔

  1. Click this Refresh Firefox button directly, if you are viewing this page in Firefox.
    This won't work if you are using a different browser or on a mobile device.
  2. To continue, click Refresh Firefox in the confirmation window that opens.
  3. Firefox will close to refresh itself. When finished, a window will list your imported information. Click Finish and Firefox will open.

Note: There's also a Refresh Firefox button in the Firefox Safe Mode window, if you can't start Firefox normally. You can also do a manual refresh by creating a new profile and transferring your important data to the new profile.

ری سیٹ فیچرکیا کرتا ہے؟

آپ کی تمام ترتیبات اور ذاتی معلومات کو محفوظ کیا جاتا ہے پروفائل کے فولڈر میں. ری سیٹ فیچر ایسے کام کرتا ہے کہ آپ کی ترتیبات اور اہم اعداد و شمار کو محفوظ کرتے وقت یہ ایک نیاپروفائل فولڈر بناتا ہے۔ فائر فاکس ان چیزوں کو محفوظ کرے گا:

  • بک مارکس
  • براؤزنگ کی تاریخ
  • پاس ورڈس
  • کوکیز
  • ویب فارم خود بخود بھرنے کی معلومات
  • بک مارکس
  • براؤزنگ کی تاریخ
  • پاس ورڈس
  • کوکیز
  • ویب فارم خود بخود بھرنے کی معلومات
  • ذاتی لغت

ط

  • براؤزنگ کی تاریخ
  • پاس ورڈس
  • کھلی ہوئی ونڈوز، ٹیبز اور ٹیب گروپس
  • کوکیز
  • ویب فارم خود بخود بھرنے کی معلومات
  • ذاتی لغت

یہ چیزیں اور ترتیبات ہٹا دی جائیں گی:

Note: Your old Firefox profile will be placed on your desktop in a folder named "Old Firefox Data." If the reset didn't fix your problem you can restore some of the information not saved by copying files to the new profile that was created. If you don't need this folder any longer, you should delete it as it contains sensitive information.

Send plugin crash reports to help Mozilla improve Firefox

This error means that a plugin (like Adobe Flash) has crashed. Simply reloading the page will restart the plugin, and your video (or other content) will be shown again. Before reloading the page you can send a crash report to Mozilla by clicking on Send crash report. These crash reports help us make improvements to Firefox.

Plugin crash notification

This error means that a plugin (like Adobe Flash) has crashed. Simply reloading the page will restart the plugin, and your video (or other content) will be shown again. Before reloading the page you can add a comment to explain how it happened and send a crash report to Mozilla by clicking on Send crash report. These crash reports help us make improvements to Firefox.

Plugin crash notification Fx21

What is a plugin?

A plugin is a piece of software that displays internet content that Firefox is not designed to display. This usually includes video, audio, online games and presentations that are made in patented formats. Plugins are created and distributed by the companies that make those patented formats. Some common plugins are Adobe Flash, Apple QuickTime, and Microsoft Silverlight.

What is a crash?

A crash happens when a piece of software abruptly stops working. Plugins sometimes crash for various reasons, and cause Firefox to crash along with it. For more information about Firefox crashes, see Firefox crashes - Troubleshoot, prevent and get help fixing crashes. Some plugins load separately from Firefox, allowing Firefox to stay open if the plugin crashes.

What information is sent in a crash report?

Crash reports only include technical information to help Firefox developers determine what went wrong, and how to fix it. These reports do not include personal information. The information sent in a report includes:

  • what webpage you were on
  • version of Firefox you were using
  • your operating system
  • installed plugins
  • installed extensions
  • and more technical info.

This information is subject to the Firefox Privacy Policy.

How do I keep plugins from crashing?

Many problems with plugins can be solved by updating to the latest version of the plugin. The name of the plugin that crashed can be found in the error message.

5e1f50c0e8ad641a461dd342ffe6a7f4-1271466371-339-1.png

Plugin name crash notification Fx21

Where can I get more info about Adobe Flash crashes?

See Adobe Flash plugin has crashed - Prevent it from happening again.

Developing for Flash with Flex?

Breakpoints can trigger Firefox's hang protection. You can disable hang protection by setting dom.ipc.plugins.timeoutSecs to -1. See the Mozilla Developer Network documentation for details.


Private Browsing - Browse the web without saving information about the sites you visit

As you browse the web, Firefox remembers lots of information for you - like the sites you've visited. There may be times, however, when you don't want people with access to your computer to see this information, such as when shopping for a present. Private Browsing allows you to browse the Internet without saving any information about which sites and pages you’ve visited. We'll show you how it works.

Important: Private Browsing doesn't make you anonymous on the Internet. Your Internet service provider, employer, or the sites themselves can still track what pages you visit. Private Browsing also doesn't protect you from keyloggers or spyware that may be installed on your computer.

How do I open a new Private Window?

There are two ways to open a new Private Window.

Open a new, blank Private Window

  • Click the menu button New Fx Menu and then click New Private Window.
    private browsing - fx29 - winxp private browsing - fx29 - win8 private browsing - fx29 - mac private browsing - fx29 - linux
  • At the top of the Firefox window, click the File menu and select New Private Window.
    fx20 new private window - file menu
    At the top of the Firefox window, click the Firefox button and select New Private Window.
    New Private Window Fx20 Win7
    On the menu bar, click the File menu and select New Private Window.

    New Private Window Fx20 Mac
    At the top of the Firefox window, click the File menu and select New Private Window.
    New Private Window Fx20 Lin
  • Right-clickHold down the control key while you click on any link and choose Open Link in New Private Window from the context menu.
    Link in Private Window Fx20 WinXP Link in Private Window Fx20 Win7 Link in Private Window Fx20 Mac Link in Private Window Fx20 Lin
Important: When in Private Browsing mode, the window title will say (Private Browsing) and there will be a purple Private Browsing mask below the Close button. You may also have other windows open that are not Private Browsing windows.When in Private Browsing mode, the Firefox button will be purple. You may also have other windows open that are not Private Browsing windows.When in Private Browsing mode, the window title will say (Private Browsing) followed by a purple Private Browsing mask. You may also have other windows open that are not Private Browsing windows.When in Private Browsing mode, the window title will say (Private Browsing) and there will be a purple Private Browsing mask below the File menu. You may also have other windows open that are not Private Browsing windows.

Normal - Private Fx20 WinXP Normal - Private Fx20 Win7 Normal - Private Fx20 Mac Normal - Private Fx20 Lin

Tip: Private Browsing windows have a purple mask at the top.
Mask - WinXP Mask - Win8 Mask - Mac Mask - Linux

How do I turn on Private Browsing?

To start Private Browsing:

  1. At the top of the Firefox window, click the Firefox button (Tools menu in Windows XP) and select Start Private Browsing.On the menu bar, click the Tools menu and select Start Private Browsing.At the top of the Firefox window, click the Tools menu and select Start Private Browsing.
    Private Browsing Win1


    Private Browsing Mac1

    Private Browsing Lin1
  2. When you turn on Private Browsing, Firefox alerts you that it will save your current windows and tabs for after you finish using Private Browsing. Click Start Private Browsing to continue.

    Private Browsing Win2


    Private Browsing Mac2

    Private Browsing Lin2
    • Check the box next to "Do not show this message again" if you don't want to receive this alert when you turn on Private Browsing.
  3. The Private Browsing information screen appears to confirm that you're in Private Browsing mode. Private Browsing Win3 Private Browsing Mac3 Private Browsing Lin3

When browsing in Private Browsing mode, the Firefox window title will say (Private Browsing)the Firefox button will be purple (for Windows XP the window title will say (Private Browsing) instead) during your session.

How do I turn off Private Browsing?

To end a Private Browsing session:

  1. At the top of the Firefox window, click the Firefox button (Tools menu in Windows XP) and select Stop Private Browsing.On the menu bar, click the Tools menu and select Stop Private Browsing.At the top of the Firefox window, click the Tools menu and select Stop Private Browsing.
    Private Browsing Win4


    Private Browsing Mac4

    Private Browsing Lin4
  2. The windows and tabs you were using when you enabled Private Browsing will appear, and you can use Firefox normally. The Firefox window title will no longer say (Private Browsing)The Firefox button will turn orange again (for Windows XP the Firefox window title will no longer say (Private Browsing)) when Private Browsing is off.

What does Private Browsing not save?

  • Visited pages: No pages will be added to the list of sites in the History menu, the Library window's history list, or the Awesome Bar address list.
  • Form and Search Bar entries: Nothing you enter into text boxes on web pages or the Search bar will be saved for Form autocomplete.
  • Passwords: No new passwords will be saved.
  • Download List entries: No files you download will be listed in the Downloads Window after you turn off Private Browsing.
  • Cookies: Cookies store information about websites you visit such as site preferences, login status, and data used by plugins like Adobe Flash. Cookies can also be used by third parties to track you across websites. For more info about tracking, see How do I turn on the Do Not Track feature?
  • Cached Web Content and Offline Web Content and User Data: No temporary Internet files (cached files) or files that websites save for offline use will be saved.
Note:
  • New bookmarks you create while using Private Browsing will be saved.
  • Any files you download to your computer while using Private Browsing will be saved.

Other ways to control what information Firefox saves


Safe Mode is a special Firefox mode that can be used to troubleshoot and fix problems. Safe Mode temporarily resets some settings and disables add-ons that might be causing problems. By comparing Firefox behavior in normal mode to its behavior in Safe Mode you may be able to pinpoint the cause of the problem.

Note: Windows users may be familiar with a Safe Mode for Windows. Firefox Safe Mode has no connection to Windows Safe Mode.
Note: The Refresh Firefox feature can fix many issues by restoring Firefox to its default state while saving your essential information. Consider using it before going through a lengthy troubleshooting process.

Troubleshoot Firefox issues using Safe Mode

How to start Firefox in Safe Mode

Click the menu button New Fx Menu , click help Help-29 Click the menu button Fx57menu , click Help and select Restart with Add-ons Disabled…. Firefox will start up with the Firefox Safe Mode dialog.

Note: You can also start Firefox in Safe Mode by holding down the shift key while starting Firefox.holding down the option key while starting Firefox.quitting Firefox and then going to your Terminal and running: firefox -safe-mode
You may need to specify the Firefox installation path (e.g. /usr/lib/firefox)

Safe Mode window

93cafd5e0e8bef77b66875863ae7f197-1259888532-113-1.png

You now have three options:

  • Clicking the Exit button cancels your attempt to get into Firefox's Safe Mode.
  • Clicking the Continue in Safe Mode button will temporarily disable your extensions and themes, turn off hardware acceleration and reset toolbar and button customizations. When you leave Safe Mode and start Firefox up normally, your extensions, themes, and settings will return to the state they were in before you entered Safe Mode.
  • The Make Changes and Restart button is only enabled if you select one of the boxes above it. See the Make permanent changes to Firefox in the Safe Mode window section below for more information.
Safe Mode Fx 15 - Win

You now have two options:

  • Clicking the Start in Safe Mode button will temporarily disable your extensions and themes, turn off hardware acceleration and reset toolbar and button customizations. When you leave Safe Mode and start Firefox up normally, your extensions, themes, and settings will return to the state they were in before you entered Safe Mode.
  • Clicking the Reset Firefox button will restore Firefox to its factory default state while saving your essential information. See Refresh Firefox - reset add-ons and settings for more information about this option.

Troubleshooting problems in Safe Mode

Once Firefox is in Safe Mode, you'll want to test its behavior and see if the problem goes away.

The problem happens in Safe Mode

If the problem still happens in Safe Mode, it is not being caused by an extension or theme. Other possible causes could be plugins or changes made to Firefox preference settings, which are not disabled in Safe Mode. See the following articles for solution:

The problem does not happen in Safe Mode

If the problem does not happen in Safe Mode, it is most likely because of an extension, theme or hardware acceleration.

Exiting Safe Mode

  1. Click the menu button New Fx Menu and then click ExitQuit Close 29 .

    Click the Firefox menu Fx57Menu , then click Exit. Click the Firefox menu at the top of the screen, then click Quit Firefox.Click the Firefox menu Fx57Menu , then click Quit.

    .
  2. Start Firefox as you normally would.

Make permanent changes to Firefox in the Safe Mode window

When you start Firefox in Safe Mode, you can elect to make the following permanent changes by selecting a checkbox and clicking the Make Changes and Restart button.

93cafd5e0e8bef77b66875863ae7f197-1259888532-113-1.png
Warning: When you make these changes and restart Firefox, they will remain in effect from that point on, unless you take additional steps to undo them. Some changes cannot be undone.
  • Disable all add-ons: If you select this box and then click Make Changes and Restart then Firefox will start back up in its normal mode, except all your extensions, themes and plugins will be disabled (not uninstalled). To undo the change, you will need to enable each extension and plugin listed in the Add-ons Manager. See this article if you need more help enabling your add-ons.
  • Reset toolbars and controls: If you select this box and then click Make Changes and Restart then Firefox will start back up in its normal mode, except any toolbar customizations you have made will be lost, such as position of buttons and toolbars. If you later want to undo this change, you will need to add back those customizations. See Customize Firefox controls, buttons and toolbars for more help.
  • Delete all bookmarks except for backups: If you select this box and then click Make Changes and Restart then Firefox will delete your current bookmarks and replace them with the default set. If you later want to undo the change, you will need to restore your bookmarks from backup. See Restore bookmarks from backup or move them to another computer for more help.
  • Reset all user preferences to Firefox defaults: If you select this box and then click Make Changes and Restart then all Firefox options and preferences will be set back to the default settings, and any changes you made to them will be undone. This change will be hard to undo, since you may not remember all of the settings you have changed.
  • Restore default search engines: If you select this box and then click Make Changes and Restart then any of the default search engines you deleted will be restored. This does not remove any added search engines. To undo this change, simply go to the Search Bar and remove the search engines you don't want.




Based on information from Safe mode (mozillaZine KB)

Firefox hangs or is not responding - How to fix

When Firefox hangs, it stops responding to your clicks and keystrokes and doesn't seem to be doing anything. Also, a "(Not Responding)" label is displayed in the title bar and the mouse becomes a spinning wait cursor when it's over the Firefox window.Also, the mouse becomes a spinning wait cursor when it's over the Firefox window. This article gives you solutions to Firefox hangs depending on when they happen.

To resolve hanging problems not specifically mentioned in this article, or if the suggested solutions do not solve the problem, see Troubleshoot and diagnose Firefox problems.

Note: The Refresh Firefox feature can fix many issues by restoring Firefox to its default state while saving your essential information. Consider using it before going through a lengthy troubleshooting process.
Note: If you send performance data, Mozilla will gather data including hangs for your Firefox, which will help making Firefox better for future versions.

Firefox hangs at random times

If Firefox seems to hang randomly and not after a specific action (for example, downloading a file or quitting Firefox), try the solutions in this section.

Create a new places database

If hangs are periodic, it may be caused by a corrupted places database.

Information: The "places" files store the annotations, bookmarks, favorite icons, input history, keywords, and browsing history (a record of visited pages).

To create a new places database, do the following:

Warning: This will clear your browsing history and remove bookmarks of the day.
  1. Open your profile folder:

    Click the menu button Fx57menu , click Help and select Troubleshooting Information.From the Help menu, choose Troubleshooting Information. The Troubleshooting Information tab will open.

    • Under the Application Basics section, click on Open FolderShow in FinderOpen Directory. A window will open that contains your profile folder.Your profile folder will open.
    Note: If you are unable to open or use Firefox, follow the instructions in Finding your profile without opening Firefox.

  2. Click the menu button New Fx Menu and then click ExitQuit Close 29 .

    Click the Firefox menu Fx57Menu , then click Exit. Click the Firefox menu at the top of the screen, then click Quit Firefox.Click the Firefox menu Fx57Menu , then click Quit.

    Wait until Firefox has completely quit.
  3. In the Firefox profile folder, find and rename the files places.sqlite to places.sqlite.old and places.sqlite-journal to places.sqlite-journal.old (if it exists).
    • To rename a file, right-click on it and select rename from the menuclick on it once to select it and then click a second time on the file name to make it editable. Then add .old to the end of its name.
  4. Finally, reopen Firefox.
    • When Firefox reopens it will create a new places database. Your browsing history will be lost but Firefox will automatically import your bookmarks from the most recent backup file.

Turn off hardware acceleration

With some graphics card and graphics driver setups, Firefox may hang when using hardware acceleration. You can try turning off hardware acceleration to see if it fixes the problem.

  1. Click the menu button New Fx Menu Fx57Menu and choose Options.Preferences.
  2. Select the Advanced panel and the General tab.
  3. Uncheck Use hardware acceleration when available.
  4. Click the menu button New Fx Menu and then click ExitQuit Close 29 .

    Click the Firefox menu Fx57Menu , then click Exit. Click the Firefox menu at the top of the screen, then click Quit Firefox.Click the Firefox menu Fx57Menu , then click Quit.

  5. Start Firefox the way you normally do.

If the problem is no longer happening, then hardware acceleration was likely the cause. You can try updating your graphics drivers to see if that fixes it or simply run without hardware acceleration.

Troubleshoot your plugins

Sites that use plugins such as Java, Adobe Reader, or Flash can cause Firefox to hang. For information on troubleshooting plugins and on determining whether a plugin is causing your problem, see the Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems article.

Delete duplicated Session Restore files

Firefox may be slow to respond or hang if multiple copies of its Session Restore file have been created:

  1. Open your profile folder:

    Click the menu button Fx57menu , click Help and select Troubleshooting Information.From the Help menu, choose Troubleshooting Information. The Troubleshooting Information tab will open.

    • Under the Application Basics section, click on Open FolderShow in FinderOpen Directory. A window will open that contains your profile folder.Your profile folder will open.
    Note: If you are unable to open or use Firefox, follow the instructions in Finding your profile without opening Firefox.

  2. Click the menu button New Fx Menu and then click ExitQuit Close 29 .

    Click the Firefox menu Fx57Menu , then click Exit. Click the Firefox menu at the top of the screen, then click Quit Firefox.Click the Firefox menu Fx57Menu , then click Quit.

  3. Locate and delete the sessionstore.js file and any copies, such as sessionstore-1.js, sessionstore-2.js.

Change the PAC implementation

If you're using a proxy auto-config file (PAC), Firefox may hang when you attempt to load sites that don't exist or that you haven't opened recently. To determine if you use an automatic proxy configuration file:

  1. Click the menu button New Fx Menu Fx57Menu and choose Options.Preferences.
  2. Click the Advanced icon.
  3. Click the Network tab.
  4. Click Settings. The Connection Settings dialog appears.
  5. If Automatic proxy configuration URL is selected, you are using an automatic proxy configuration file. Do not disable this setting, which will prevent you from accessing the Internet. Instead, provide this workaround to your network administrator.
  6. Click Cancel.

Firefox hangs while playing Flash videos

See Playing Flash videos makes Firefox hang.

Firefox hangs after using it for a long time

Update Firefox

The latest Firefox versions includes improvements in memory usage, especially during long sessions. Update Firefox to the latest version.

Restart Firefox

Firefox may hang if left open for long periods of time. To fix the issue, restart Firefox.

If you regularly leave Firefox open so that you return to where you left off, you may want to use Firefox's Session Restore feature. For more information, see Configuring session restore.

Firefox hangs while loading the first window

Speed up Session Restore

If you have many tabs to restore, Firefox may hang while loading those sites. Make sure that Don't load tabs until selected is checked in the Tabs panel of the OptionsPreferences window so that only the last selected tab is loaded at startup. You can also try to use Tab Groups so that only websites in the visible tab group load first.

Firefox hangs when downloading files or saving images

If Firefox hangs when you attempt to download a file or save an image, try these solutions:

Clear download history

Firefox may hang when downloading files if your download history has grown too large. To clear the download history:

  1. At the top of the Firefox window, click on the Firefox button (Tools menu in Windows XP), and then click DownloadsOn the menu bar, click on the Tools menu, and then click DownloadsAt the top of the Firefox window, click on the Tools menu, and then click Downloads. The Downloads window will open.Click the Downloads button fx20 download icon and then click Show All Downloads. The Library window will open.
  2. Click Clear List. The download history is cleared.Click Clear Downloads to delete the download history.
  3. Download some sample files to see if the hanging has stopped.

Choose a different download folder

Firefox may hang if the last download folder location (e.g. a shared volume or USB drive) is no longer available. To fix this:

  1. Click the menu button New Fx Menu Fx57Menu and choose Options.Preferences.
  2. Select the General panel.
  3. In the Downloads pane, select Save files to and click the Browse button.
  4. In the Browse For Folder window, choose a new folder location.
  5. Close the about:preferences page. Any changes you've made will automatically be saved.

See if you are now able to download files or save images. If this works, you can go back to your Firefox settings, if you wish, and select Always ask me where to save my files.

Disable virus scan in Firefox preferences

With some antivirus programs, the virus scan that Firefox starts after files are downloaded may cause Firefox to hang. You can disable virus scanning with the following steps (this will not disable your antivirus program):

  1. In the address bar, type about:config and press EnterReturn.

    • The about:config "This might void your warranty!" warning page may appear. Click I accept the risk! to continue to the about:config page.
  2. Locate the browser.download.manager.scanWhenDone preference and double click it to change the value to false.

Firefox hangs when you quit it

Sometimes when you close Firefox, it may stop responding and remain in memory, even though no Firefox windows are open. This can prevent Firefox from working properly the next time you open it or you may see a "Close Firefox" dialog box with the message, Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system.. You must then end all Firefox processes or restart the computer before you can reopen Firefox (see "Firefox is already running but is not responding" error message - How to fix it for other causes and solutions).

Close Firefox completely

  1. Click the menu button New Fx Menu and then click ExitQuit Close 29 .

    Click the Firefox menu Fx57Menu , then click Exit. Click the Firefox menu at the top of the screen, then click Quit Firefox.Click the Firefox menu Fx57Menu , then click Quit.

  2. Close any remaining dialog boxes or secondary windows such as the Downloads window.


If Firefox processes that remain in memory at exit are a recurring problem, try the following solutions.

Troubleshoot your extensions

A problematic extension can cause the problem, which can be resolved by disabling or uninstalling the extension. For information on diagnosing and fixing problems caused by faulty extensions, see the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article.

Update or disable the Java plugin

Sometimes Java applets can cause the Firefox process to persist after exit. Try updating Java to the latest version by going to Mozilla's plugin check page or, if you don't need the Java plugin, you can disable it from the Plugins panel of the Firefox Add-ons Manager. For more information, see Use the Java plugin to view interactive content on websites.

Troubleshoot your Internet security software

Interactions between certain Internet security software (firewall, anti-virus software) is reported to cause hangs on some systems. You can try to configure your firewall to see if it helps the hang go away.




Based on information from Firefox hangs (mozillaZine KB)


How to set the home page

We'll show you how to automatically open any web page you want when you launch Firefox or click the Home button Home Button .

Important: If your home page was hijacked or automatically changed, see Refresh Firefox - reset add-ons and settings.

Set or change your home page

  1. Open the website you want to set as your home page.
  2. Click the icon to the left of the web address, drag it to the Home button, and release.
    Home page Win1 Home page Mac1 Home page Lin1
  3. Click Yes to set this as your home page.

  1. Open a tab with the website you want to use as your home page.
  2. Drag and drop that tab onto the Home button Home Button .
    Home Page 29 - WinXP Home Page 29 - Win8 Home Page 29 - Mac Home Page 29 - Linux
  3. Click Yes to set this as your home page.

Tip: More home page settings are available in the OptionsPreferences window.

  • Click on the Firefox button, select Options and then choose the General panel.Click on the Tools menu, select Options and then choose the General panel.Click on the Firefox menu, select Preferences... and then choose the General panel.Click on the Edit menu, select Preferences and then choose the General panel.
    • From the drop-down menu you can choose to have Firefox show a blank page on startup or all of your windows and tabs from last time.
    • You can also set multiple pages as your home page by opening each in a separate tab and clicking Use Current Pages.
  • Click the menu button New Fx Menu , select OptionsPreferences and then choose the General panel.
    • From the drop-down menu you can choose to have Firefox show a blank page on startup or all of your windows and tabs from last time.
    • You can also set multiple pages as your home page by opening each in a separate tab and clicking Use Current Pages.

Restore the default home page

If you want to delete your home page customizations, this is the way to do it.

  1. Click the menu button New Fx Menu Fx57Menu and choose Options.Preferences.
  2. Select the General panel.
  3. In the Startup box, click Restore to Default.
    Home page Win3 Home page Mac3 Home page Lin3
  4. Close the about:preferences page. Any changes you've made will automatically be saved.

Having problems?

We have answers:


Firefox crashes - Troubleshoot, prevent and get help fixing crashes

A crash is what happens when Firefox closes or quits unexpectedly. After a crash, you should see the Mozilla Crash Reporter appear. This article will help you fix crashes and show you how to get more help if you're having difficulties.

Note: If Firefox is open but won't respond to any of your actions, then this is a hang, not a crash. See Firefox hangs or is not responding - How to fix for solutions.

If Firefox crashes on startup, first check to see if the crash happens in safe mode (see below). Otherwise, follow these steps in order.

Update your software

The crash you're experiencing may have already been fixed in a new version!

Update Firefox

Every Firefox release includes a number of fixes for crashes that people have reported. Making sure you have the latest version may fix your crash. See Update Firefox to the latest release for details.

Update your plugins

Check that you have the latest versions of all your plugins.

  • Go to our Plugin Check page and follow the links to update any plugins that are out of date.

Update Windows

Make sure you have all of the latest security and stability fixes.

  • Go to the Start menu, select All Programs and then Windows Update.

Update OS X

Make sure you have all of the latest security and stability fixes.

  • Go to the Apple menu and select Software Update…

Update Linux

Make sure you have all of the latest security and stability fixes.

  • Go to the System menu, down to Administration and select Update Manager.

Update your drivers

Check if your graphics drivers are up-to-date. For more info, see Upgrade your graphics drivers to use hardware acceleration and WebGL.

If your crash happens while printing, check that your printer driver is up-to-date by going to your printer manufacturer's support website.

Update your Internet Security software

Make sure you have the latest version of your Internet security software (including firewalls, antivirus programs, anti-spyware programs, and more).

Check for viruses or spyware

A number of different viruses and spyware are known to crash Firefox. To ensure that your system is clean of spyware and viruses, install, update their virus databases, and use both of these programs:

For more information, see Troubleshoot Firefox issues caused by malware.

Check to see if the crash happens in safe mode

If updating software didn't work or if Firefox crashes on startup, use the steps below to test whether the crash happens in Firefox Safe Mode or not and then follow the instructions in the recommended articles.

Note: The Refresh Firefox feature can fix many issues by restoring Firefox to its default state while saving your essential information. Consider using it before going through a lengthy troubleshooting process.
  1. Click the menu button New Fx Menu , click help Help-29 Click the menu button Fx57menu , click Help and select Restart with Add-ons Disabled…. Firefox will start up with the Firefox Safe Mode dialog.
    Note: You can also start Firefox in Safe Mode by holding down the shift key while starting Firefox.holding down the option key while starting Firefox.quitting Firefox and then going to your Terminal and running: firefox -safe-mode
    You may need to specify the Firefox installation path (e.g. /usr/lib/firefox)
  2. When the Firefox Safe Mode window appears, press the button Continue in Safe ModeStart in Safe Mode.

After Firefox starts in Safe Mode, test for your problem.

The crash still happens in Safe Mode

If your crash still happens in Safe Mode, it is not being caused by an extension, theme or hardware acceleration. See if Firefox hot topics include a solution and, if it doesn't, try to get help with your crash ID.

The crash doesn't happen in Safe Mode

If your crash doesn't happen in Safe Mode, it is most likely because of an extension, theme or hardware acceleration.

Check your hardware

Check your RAM for errors

If Firefox crashes repeatedly, check your RAM for errors using for instance the following tool, Memtest86+Rember.

Get help fixing this crash

Figuring out the cause of a crash can be difficult. If you've tried the steps above and can't get Firefox to stop crashing, the steps below will show you how to collect information about your crash so our volunteers can help you.

  1. Get the Report ID of your latest crash report:
    • If you can open Firefox, at least in Safe Mode:
      1. In the Firefox Location bar, type about:crashes and hit EnterReturn. A page listing submitted crash reports will appear.
      2. Right-clickHold down the control key while you click on the latest crash under Report ID and choose Open Link in New Tab. A tab will open to a page on crash-stats.mozilla.com, saying that "Your report is being processed". When it is finished processing, close the report tab.
    • If you can't open Firefox because it crashes at startup even in Safe Mode:
      1. Click the Windows Start button, and select Run…press Windows Key + R. Type in "%APPDATA%\Mozilla\Firefox\Crash Reports\submitted" (including the quotation marks) and click OK.(OS X 10.6 or previous) Click the Finder icon in the dock. Your home folder will be selected. In the right side of the window, click the Library folder to open it. Then open the "Application Support" folder, the "Firefox" folder, the "Crash Reports" folder and finally the "submitted" folder.
        (OS X 10.7 or above) Click the Finder icon in the dock. On the menu bar, click the Go menu, hold down the option or alt key and select Library. A window will open containing your Library folder. Then open the "Application Support" folder, the "Firefox" folder, the "Crash Reports" folder and finally the "submitted" folder.
        Go to ~/.mozilla/firefox/Crash Reports/submitted.
      2. In the resulting folder will be a text file for each crash report you have submitted. Using the View menu, arrange them by date to find out which is the newest file; and double-click on it to open it.
  2. Click this link to ask for help with your crash.
    Note: This link is only valid for help with crashes.
  3. Create an account.
  4. Fill out the Details section of the next page with as much information you have about the crash. Include any of the steps you completed above, like updating Firefox or testing for the crash in safe mode.
  5. Copy the long Report ID number you've got above for the latest crash (looks like bp-…) and paste it into the "Details" section.
  6. Click the green Automatically add button to submit additional troubleshooting information.
  7. Finally, click the Post Question button.
    We know that providing all this information is time consuming but it will make it much easier for our volunteers to help you.
    Crashes AAQ



Based on information from Firefox crashes (mozillaZine KB)

// These fine people helped write this article:Mubashir Ahmed Abbasi. You can help too - find out how.

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