Why "Prevent this page from creating additional dialogs" appears in the alert box?

javascript html ruby-on-rails alert firefox4
Misha Moroshko picture Misha Moroshko · May 1, 2011 · Viewed 82.3k times · Source

In my Rails 3 application I do:

render :js => "alert(\"Error!\\nEmpty message sent.\");" if ...

Sometimes, below this error message (in the same alert box) I see: "Prevent this page from creating additional dialogs" and a checkbox.

What does this mean ?

Is that possible not to display this additional text and checkbox ?

I use Firefox 4.

Answer

Marcel Korpel picture Marcel Korpel · May 1, 2011

It's a browser feature to stop websites that show annoying alert boxes over and over again.

As a web developer, you can't disable it.

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