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Firefox Thinks my Desktop PC is a Mobile Device

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For some reason when I navigate certain sites such as PayPal I am provided with the "mobile" version of the site. I try to reload the page(s) with the default URL and it is still redirected to the mobile version. HELP!

For some reason when I navigate certain sites such as PayPal I am provided with the "mobile" version of the site. I try to reload the page(s) with the default URL and it is still redirected to the mobile version. HELP!

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The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions, Open websites, and some Preferences.

To Reset Firefox do the following:

  1. Go to Firefox > Help > Troubleshooting Information.
  2. Click the "Reset Firefox" button.
  3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
  4. Firefox will open with all factory defaults applied.


Further information can be found in the Refresh Firefox - reset add-ons and settings article.

Did this fix your problems? Please report back to us!

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Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

  • Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

  • Tools > Options > Privacy > Cookies: "Show Cookies"

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do NOT click the Reset button on the Safe mode start window or otherwise make changes.

You can check for problems with preferences and try to rename or delete the prefs.js file and possible numbered prefs-##.js files and a possible user.js file to reset all prefs to the default values.

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I had this issue today, was advises to clear cookies etc to no avail and suddenly ir has come right, whatever

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ppjamieson,

Please stick with the thread that you started about this issue.

https://support.mozilla.org/en-US/questions/958003?esab=a&s=&r=0&as=s