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Windows 10 may interrupt your Firefox install with a warning about "Microsoft-verified apps". Firefox is safe to install and use, so choose "install anyway".

In certain versions of Windows 10, you may receive a notification with a warning about ''Microsoft-verified apps'' when you run the Firefox installer. [[Image:use a Microsoft verified app|width=600]] '''Any copy of Firefox downloaded from www.mozilla.<!-- -->org is safe to install''', so choose "''Install anyway''". {note} '''Note:''' *You can also [[Download Firefox on Windows from the Microsoft Store|download and install Firefox from the Microsoft Store]]. *'''Using Windows 10 in S mode?''' See [[Windows 10 S won't let me install Firefox]]. {/note} If you do not see the option to “''Install anyway''”, follow the steps below to change your system settings. #Open the Windows 10 start menu and select [[Image:Start settings in-line image|width=120]] . #Click on '''Apps''' in the ''Windows Settings'' menu. #;[[Image:w10 Apps settings|width=600]] <br> #In the [[Image:w10 Apps and features|width=160]] section go to '''Choose where to get apps''', click on the dropdown menu below and select one of the options that allows you to install from ''Anywhere''. #;[[Image:w10 Choose where to get apps|width=600]] #Run the Firefox Installer again. Your Windows may now allow it to install Firefox. = Related content = * [[Why do I get a harmful download message when downloading Firefox on Windows?]]