This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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. Əgər kömək lazımdırsa lütfən yeni sual verin.

I keep getting typeerror:verizon_DTFox.prefs is undefined

  • 1 cavab
  • 4 have this problem
  • 13 views
  • Last reply by cor-el

ldhkah
ldhkah
more options

Whenever I try to go to the internet I get the following error message: TypeError: verizon_DTFox.prefs is undefined All I have to do is click on "OK" and it lets me go to my homepage. It also does it when I try to open other windows within any website. For instance, if I am at Verizon's homepage and want to check out the news, I click on "News" and get that message. I have to click on "OK" and then it lets me go to the newsroom. On Facebook, for ex., if I want to check my messages, I click on "messages", get the error message, click on "OK", and then can go to my messages.

Whenever I try to go to the internet I get the following error message: TypeError: verizon_DTFox.prefs is undefined All I have to do is click on "OK" and it lets me go to my homepage. It also does it when I try to open other windows within any website. For instance, if I am at Verizon's homepage and want to check out the news, I click on "News" and get that message. I have to click on "OK" and then it lets me go to the newsroom. On Facebook, for ex., if I want to check my messages, I click on "messages", get the error message, click on "OK", and then can go to my messages.

All Replies (1)

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

This error can be caused by an extension (Tools > Add-ons > Extensions).

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

See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems

Modified by cor-el