This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Firefox sees my Windows 11 laptop as a mobile device, and some websites don't work properly

  • 2 replies
  • 0 have this problem
  • 11 views
  • Last reply by zeroknight

more options

I have been using Firefox since I cannot even remember when. I never had a problem with Windows 10, but since I got a Windows 11 Dell laptop a couple of years ago I have been unable to use some websites. This one in particular: french.typeit.org. It allows me to write in French, with French accents and some special characters and letters that do not exist in an English keyboard. Always worked flawlessly with FF on Windows 10, but with Windows 11, I am able to write in English, but when I hit a French character nothing happens. I tried disabling all extensions, deleted history, etc., in vain. I contacted the app developer, and after a back and forth exchange with him he determined Firefox sees my laptop as a mobile device, and that is why his app will not work. He said he thought there was nothing I could do on my end, so FF needs to do something. I use this app with the Brave and Edge browsers with no problems at all, but I would much prefer to use FF if I can. Thank you.

I have been using Firefox since I cannot even remember when. I never had a problem with Windows 10, but since I got a Windows 11 Dell laptop a couple of years ago I have been unable to use some websites. This one in particular: french.typeit.org. It allows me to write in French, with French accents and some special characters and letters that do not exist in an English keyboard. Always worked flawlessly with FF on Windows 10, but with Windows 11, I am able to write in English, but when I hit a French character nothing happens. I tried disabling all extensions, deleted history, etc., in vain. I contacted the app developer, and after a back and forth exchange with him he determined Firefox sees my laptop as a mobile device, and that is why his app will not work. He said he thought there was nothing I could do on my end, so FF needs to do something. I use this app with the Brave and Edge browsers with no problems at all, but I would much prefer to use FF if I can. Thank you.

All Replies (2)

more options

You can install the US International keyboard layout and switch to that layout if you need to type accented letters. This layout supports dead keys and easily allows to enter accented characters easily. You can assign a specific keyboard sequence to select this layout and disable a possible simple modifier shortcut to cycle between layouts.

more options

Using the Alt key as a modifier does not work for me on this site with privacy.resistFingerprinting set to true in about:config. The site lets you change it to Ctrl which does work.

Does it still happen in a new profile? An easy way to test a new profile is to install Developer Edition and see if it happens there or refresh your existing profile. Make sure you stay signed out of your sync account when testing.