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Type Error: Yahoo.widget.overlay is not a constructor. Only get error in Firefox, and started this morning.

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New Contributor

Type Error: Yahoo.widget.overlay is not a constructor. Only get error in Firefox, and started this morning.

There was an automatic Windows update this morning. Since then, I get the error message "TypeError: Yahoo.widget.overlay is not a constructor" when I open up certain websites, such as ancestry.com. Other sites, such as Facebook, don't work at all. Everything appears scrambled when I open the website. Other sites appear to not be affected, although I haven't done more than open them up. These errors are only occurring with Firefox, and not with IE. IE still works just fine.

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New Contributor

Re: Type Error: Yahoo.widget.overlay is not a constructor. Only get error in Firefox, and started this morning.

A friend just gave me a tip which solved this problem. I went to the Options menu, Content, and unchecked the box that said "Enable Java Script." I have no idea why this worked, but it solved the problem and all the websites appear to be working fine again.

4 REPLIES
New Contributor

Re: Type Error: Yahoo.widget.overlay is not a constructor. Only get error in Firefox, and started this morning.

I have the same problem, Firefox 15 Windows 7 64 Bit

Site Moderator

Re: Type Error: Yahoo.widget.overlay is not a constructor. Only get error in Firefox, and started this morning.

Sounds like a problem with an Yahoo extension (toolbar)

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do not click the Reset button on the Safe mode start window or otherwise make changes.
New Contributor

Re: Type Error: Yahoo.widget.overlay is not a constructor. Only get error in Firefox, and started this morning.

Thanks for the suggestion, but unfortunately it didn't work. The same problems occur in safe mode as well.

New Contributor

Re: Type Error: Yahoo.widget.overlay is not a constructor. Only get error in Firefox, and started this morning.

A friend just gave me a tip which solved this problem. I went to the Options menu, Content, and unchecked the box that said "Enable Java Script." I have no idea why this worked, but it solved the problem and all the websites appear to be working fine again.