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slow delayed startup second minute launch

This article describes some causes of a long start up time and steps you can take to improve it.

This article describes some causes of a long start up time and steps you can take to improve it. *If Firefox starts but isn't responsive, see [[Firefox hangs#w_hang-loading-first-window]]. *If Firefox does not start up at all, see [[Firefox will not start]]. {for fx13} {note}'''Note:''' [[Template:reset-fx]]{/note} {/for} __TOC__ = Change the home page = Problems with a website can cause Firefox to take a long time to start. Try changing your Firefox home page to the default home page or a blank page. See [[How to set the home page]] for instructions. = Change how windows and tabs are loaded = {for not fx13} If you set Firefox to use the [[Restore previous session - Configure when Firefox shows your most recent tabs and windows|Session Restore]] feature to show your windows and tabs from last time, Firefox can take a long time to start if you had lots of websites open the last time you used Firefox. Check '''Don't load tabs until selected''' in the [[Options window - General panel|General panel of the {for win}Options{/for}{for mac,linux}Preferences{/for} window]] so that only the last selected tab is loaded at startup. {for win}<br><br>[[Image:Startup-loadtabs]]{/for} {/for} {for =fx13,=fx14} If you set Firefox to use the [[Restore previous session - Configure when Firefox shows your most recent tabs and windows|Session Restore]] feature to show your windows and tabs from last time, Firefox can take a long time to start if you had lots of websites open the last time you used Firefox. Check '''Don't load tabs until selected''' in the [[Options window - General panel|General panel of the {for win}Options{/for}{for mac,linux}Preferences{/for} window]] so that only the last selected tab is loaded at startup (This should be the default setting). {for win}<br><br>[[Image:Startup-loadtabs]]{/for} {/for} {for fx15} If you set Firefox to use the [[Restore previous session - Configure when Firefox shows your most recent tabs and windows|Session Restore]] feature to show your windows and tabs from last time, Firefox can take a long time to start if you had lots of websites open the last time you used Firefox. Check '''Don't load tabs until selected''' in the [[Tab preferences and settings|Tabs panel of the {for win}Options{/for}{for mac,linux}Preferences{/for} window]] so that only the last selected tab is loaded at startup (This should be the default setting). {/for} <!-- https://support.mozilla.com/questions/776797 and https://blog.mozilla.com/tglek/2010/10/04/diagnosing-slow-startup --> = Check your antivirus software = Firefox reads a number of files normally during startup. Some antivirus software may do intensive scans of each of these files during startup and block access until those scans complete. If the problem began after installing, updating, or reconfiguring your antivirus software, contact the software provider for assistance. <!-- https://blog.mozilla.com/tglek/2010/10/04/diagnosing-slow-startup --> = Troubleshoot extensions or themes = Firefox loads extensions when it starts up and many extensions add startup tasks. See [[Troubleshooting extensions and themes]] for steps on how to identify an extension that may be causing the problem. {for win} = Optimize Windows = Speed up Windows and make your computer work better. See [http://windows.microsoft.com/en-US/windows7/Optimize-Windows-7-for-better-performance Optimize Windows 7 for better performance] where some recommendations are also applicable to other Windows versions. {/for} {for win} = Use Windows Update to install a fix from Microsoft = {note}This section only applies to Windows 7 or Windows Server 2008 R2.{/note} Microsoft has released the recommended [http://support.microsoft.com/kb/2505438 KB2505438] update that fixes slow startup performances in Firefox when HW acceleration is enabled. To make sure, you have this update installed: # In Windows, click [[Image:Small Vista Logo]], select {menu All programs}, then select {menu Windows Update}. The Windows Update window will open. # Click the "Check for updates" link and wait until it is done. #* If no updates are available, you have this KB update installed. Skip to the next section. # Click "''n'' optional updates are available". The View available updates panel will appear. # Click "Optional" and search KB2505438 in the list. #* If you don't find it, you have this KB update installed. Skip to the next section. # Check it and click {button OK} to close the View available updates panel. # Click {button Install updates}. # Restart your computer. # Start Firefox and check if it loads faster. {/for} = Other solutions = If the previous suggestions don't significantly reduce Firefox startup time, see [[Basic troubleshooting]] for other steps you can take to resolve the problem. [[Template:ShareArticle|link=http://mzl.la/MP4wqF]]