firefox がエラーを出した

ASSERT: *** Search: _installLocation: engine has no file!
Stack Trace: 
0:ENSURE_WARN(false,_installLocation: engine has no file!,2147500037)
1:()
2:()
3:()
4:epsGetAttr([object Object],alias)
5:()
6:SRCH_SVC_getEngineByAlias(http://weather.yahoo.co.jp/weather/jp/11/4310/11209/3570044.html)
7:getEngineByAlias(http://weather.yahoo.co.jp/weather/jp/11/4310/11209/3570044.html)
8:getShortcutOrURI(http://weather.yahoo.co.jp/weather/jp/11/4310/11209/3570044.html,[object Object])
9:canonizeUrl([object KeyboardEvent],[object Object])
10:handleURLBarCommand([object KeyboardEvent])
11:anonymous(textentered,[object KeyboardEvent])
12:fireEvent(textentered,[object KeyboardEvent])
13:onTextEntered()
14:handleEnter(false)
15:onKeyPress([object KeyboardEvent])
16:onxblkeypress([object KeyboardEvent])