We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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

How can I go back to the previous version before firefox4, some of my addons etc guarded ID , does not work with 4

  • 1 jibu
  • 6 wana tatizo hili
  • 2 views
  • Last reply by Xircal

more options

error on java script application: Type Error:obj is undefined appears

error on java script application: Type Error:obj is undefined appears

All Replies (1)

more options

Sorry to hear about your problems.

Go to Download Firefox v3.6.16 and download it to the desktop.

Then go to Add/Remove Programs, scroll down to Mozilla Firefox and remove it, choosing to keep your bookmarks, customizations etc., (don't checkmark the box).

Then reboot and delete the folder called Mozilla Firefox at this location: C:\Program Files\Mozilla Firefox

Finally run the installation file you downloaded.

After you complete the installation, go to the Plugins Check page and update those if necessary.