Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Avatar for Username

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

Echekwara usoro a. Biko jụọ ajụjụ ọhụrụ ma ọ bụrụ na ị chọrọ enyemaka.

'FB is not defined error' in Firefox when trying to login in incognito mode

  • 1 nzaghachinzaghachi
  • 1 nwere nsogbu anwere nsogbu a
  • 1 view
  • Nzaghachi ikpeazụ nke cor-el

maruthi1
maruthi1
more options

in my application we have a login to FB button. when user clicks on it is giving 'FB is not defined error' in incognito mode. when i turn off tracking protection for incognito browser it is working fine

in my application we have a login to FB button. when user clicks on it is giving 'FB is not defined error' in incognito mode. when i turn off tracking protection for incognito browser it is working fine

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

This is likely caused by blocking third-party social media trackers via Tracking Protection. If you have Tracking Protection enabled in all windows then you will have this issue in normal windows as well.

You can check in the Web Console what content Tracking Protection is blocking.

  • "3-bar" menu button or Tools -> Web Developer