Since the upgrade, I get an error popup Javascript on all websites I try to visit.

Since upgrading to Firefox 17.0.1, many Web pages spawn a popup (or several pop-up windows) with a very vague error message: [Javascript Application] error: syntax error. He is using the little impossible browser. Any ideas?

The reset Firefox feature can solve a lot of problems in restaurant Firefox to its factory default condition while saving your vital information.
Note: This will make you lose all the Extensions, open Web sites and preferences.

To reset Firefox, perform the following steps:

  1. Go to Firefox > help > troubleshooting information.
  2. Click on the button 'Reset Firefox'.
  3. Firefox will close and reset. After Firefox is finished, it will display a window with the imported information. Click Finish.
  4. Firefox opens with all the default settings applied.

Information can be found in the article Firefox Refresh - reset the settings and Add-ons .

This solve your problems? Please report to us!

Tags: Firefox

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