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On opening a new tab a message in the tab says "Problem loading page". 'Startup' settings under 'General' in 'Options' are set to default.

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Whenever I open a new blank tab in Firefox a message in the tab says "Problem loading page".

The message on the browser screen says: The address isn't valid The URL is not valid and cannot be loaded.

* Web addresses are usually written like http://www.example.com/
* Make sure that you're using forward slashes (i.e. /).

I have the same problem whenever I click on "Sign in to Sync".

The new tab opened by Firefox has the same message - "Problem loading page" - in the tab.

The 'Startup' settings under the 'General' tab in 'Options' are set to default.

I have attached a screen shot of the browser window.

Whenever I open a new blank tab in Firefox a message in the tab says "Problem loading page". The message on the browser screen says: The address isn't valid The URL is not valid and cannot be loaded. * Web addresses are usually written like http://www.example.com/ * Make sure that you're using forward slashes (i.e. /). I have the same problem whenever I click on "Sign in to Sync". The new tab opened by Firefox has the same message - "Problem loading page" - in the tab. The 'Startup' settings under the 'General' tab in 'Options' are set to default. I have attached a screen shot of the browser window.
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Hi,

It sounds like a setting was changed on your new tab page. These changes are usually caused by third-party toolbars or add-ons. I understand that you would like to know how to change it back. Not a problem, please follow the steps below:

  1. In the Location bar, type about:config and press Enter. The "This might void your warranty!" warning page may appear.
  2. Click I'll be careful, I promise! to continue to the about:config page.
  3. Type browser.newtab.url in the search box to find it on the list.
  4. Double-click on browser.newtab.url and type in about:newtab in the window that pops up.

Restart Firefox and open a new tab to make sure the change was made. If there is any issues with plugins please also see: Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems

Please post back with your results, we are happy to help.