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.

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

This thread was archived. Please ask a new question if you need help.

I can't open FF and get message: Error: a is undefined

  • 2 replies
  • 2 have this problem
  • 14 views
  • Last reply by JoanBrevard

JoanBrevard
JoanBrevard
more options

FF won't open, even if in safe mode. Under FF, I get an error box with the message "Error: a is undefined" the error info is "Source File: http://www.google.com/extern_js/f/CgJlbhICdXMrMFo4ACwrMA44ACwrMBc4ACwrMDw4ACwrMFE4ACwrMFk4ACwrMAo4AEBdmgICcHMsKzAWOAAsKzAZOAAsKzAlOAAsKzAqOAAsKzArOAAsKzA1OAAsKzBAOAAsKzBBOAAsKzBNOAAsKzBOOAAsKzBTOAAsKzBUOAAsKzBfOAAsKzBjOAAsKzBpOAAsKzB0OAAsKzAdOAAsKzBcOAAsKzAYOAAsgAI8kAI2/BFKlF3L_Vtk.js Line: 333" What is solution?

FF won't open, even if in safe mode. Under FF, I get an error box with the message "Error: a is undefined" the error info is "Source File: http://www.google.com/extern_js/f/CgJlbhICdXMrMFo4ACwrMA44ACwrMBc4ACwrMDw4ACwrMFE4ACwrMFk4ACwrMAo4AEBdmgICcHMsKzAWOAAsKzAZOAAsKzAlOAAsKzAqOAAsKzArOAAsKzA1OAAsKzBAOAAsKzBBOAAsKzBNOAAsKzBOOAAsKzBTOAAsKzBUOAAsKzBfOAAsKzBjOAAsKzBpOAAsKzB0OAAsKzAdOAAsKzBcOAAsKzAYOAAsgAI8kAI2/BFKlF3L_Vtk.js Line: 333" What is solution?

Chosen solution

  • "Clear the Cache": Firefox > Preferences > Advanced > Network > Offline Storage (Cache): "Clear Now"
  • "Remove the Cookies" from sites causing problems: Firefox > Preferences > Privacy > Cookies: "Show Cookies"

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Appearance/Themes).

  • Don't make any changes on the Safe mode start window.

See:

Read this answer in context 👍 0

All Replies (2)

cor-el
cor-el
  • Top 25 Contributor
  • Moderator
more options

Chosen Solution

  • "Clear the Cache": Firefox > Preferences > Advanced > Network > Offline Storage (Cache): "Clear Now"
  • "Remove the Cookies" from sites causing problems: Firefox > Preferences > Privacy > Cookies: "Show Cookies"

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Appearance/Themes).

  • Don't make any changes on the Safe mode start window.

See:

JoanBrevard
JoanBrevard Question owner
more options

Clearing the Cache as described worked. Thank you very much.