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Want to switch to the 64-bit version of Firefox? Here's how...

[[Template:WindowsOnly]] The 64-bit version of Firefox can provide better performance than the 32-bit version. Want to switch to the 64-bit version of Firefox? Just install the 64-bit version and uninstall the 32-bit version. Your [[Profiles - Where Firefox stores your bookmarks, passwords and other user data|Firefox user data]] (passwords, bookmarks, settings, [[Find and install add-ons to add features to Firefox| extensions and themes]], etc.) will not be removed. {warning} * 64-bit Firefox requires a 64-bit version of Windows 7 or higher. To find out if you are running a 64-bit version of Windows, visit [https://support.microsoft.com/en-us/kb/827218 this Microsoft article]. {for not fx52} * 64-bit Firefox only supports the [[Flash Plugin - Keep it up to date and troubleshoot problems|Adobe Flash]] and [[Use the Silverlight plugin to play audio and video|Microsoft Silverlight]] NPAPI plugins. See [[Why do Java, Silverlight, Adobe Acrobat and other plugins no longer work?|this article]] about changes in Firefox plugin support.{/for} {/warning} {warning} Users of Microsoft Office Outlook: Before changing from 32-bit Firefox to 64-bit Firefox, it is recommended to temporarily change your default browser to Internet Explorer. You can change it back to Firefox after the change. This is important to avoid problems opening links from messages in Outlook. See: Make Internet Explorer your default browser Make Firefox your default browser If you skipped this step and encounter errors along the lines of "This operation has been cancelled due to restrictions in effect on this computer. Please contact your system administrator.", you can find a help page here: This operation has been cancelled due to restrictions. <!--Localizers: replace English%20(US) with your language--> # Go to [https://www.mozilla.org/firefox/all/?q=English%20(US) this Mozilla Firefox download page] and click on the '''Windows 64-bit''' download link. #;[[Image:DownloadWin64-bit]] # Run the setup file you've just downloaded and follow the prompts to install the 64-bit version of Firefox. # Close Firefox. # Now it's time to remove the 32-bit version. Open the Windows {menu Start} menu and click on {for not win7}{menu Settings}{/for}{for win7}{menu Control Panel}{/for}. Open the {for not win7}{menu System}{/for}{for win7}{menu Programs}{/for} panel, then select the {for not win7}{menu Apps & features} tab{/for}{for win7}{menu Programs and Features} panel{/for}. # Scroll down the list of {for not win7}apps{/for}{for win7}programs{/for} until you find the '''Mozilla Firefox''' item that contains '''x86''' in the name. Select it, and click {button Uninstall}. # Follow the prompts in the Uninstall Wizard to complete the removal of the 32-bit version.