This is, by far, the superior stock ticker for Firefox. However, I do not completely agree with the developer's reply on September 9. If this is a Yahoo! Finance issue, why do I get the same error message that ^DJIA can't be verified when I switch to Google Finance? Also, the "FoxStocks" add-on, which is a competitors plug-in, successfully displays the ^DJIA ticker. I believe the issue is in the StockFox code.