Important Notice: We're experiencing email notification issues. If you've posted a question in the community forums recently, please check your profile manually for responses while we're working to fix this.

On Monday the 3rd of March, around 5pm UTC (9am PT) users may experience a brief period of downtime while one of our underlying services is under maintenance.

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

"ReferenceError: prepareFFB is not defined" I started getting this JavaScript error recently whenever I start Firefox. I would like to stop getting this error

  • 3 replies
  • 3 have this problem
  • 4 views
  • Last reply by nsschultz

more options

I get the following JavaScript error every time I start Firefox:

ReferenceError: prepareFFB is not defined.
I get the following JavaScript error every time I start Firefox: ReferenceError: prepareFFB is not defined.

Chosen solution

hello, this sounds like it's possibly caused by an addon. do you have any extension/theme installed, you can connect the "FFB" to? if not try disabling them all in firefox > addons > extensions & reenable them one by one to find out which of them might be causing the error message.

Read this answer in context 👍 2

All Replies (3)

more options

Chosen Solution

hello, this sounds like it's possibly caused by an addon. do you have any extension/theme installed, you can connect the "FFB" to? if not try disabling them all in firefox > addons > extensions & reenable them one by one to find out which of them might be causing the error message.

more options
more options

It was the FlashFirebug 3.5.3 add on that caused the error. Thanks madperson!

Modified by nsschultz