How to check the site by emulating the lack of a flash player?

Question

HTML

In continuation of the question How to make a stub if the flash player is not installed?
How to make a stub if the flash player is not installed?
Used the solution

<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0" height="400" width="640">
    <param name="menu" value="false" />
    <param name="quality" value="high" />
    <param name="movie" value="myflash.swf" />
    <!--[if !IE]>-->
    <object height="400" data="myflash.swf" type="application/x-shockwave-flash" width="640" wmode="direct">
    <!--<![endif]-->
    <img src="image.gif" width="640" height="400" />
    <!--[if !IE]>-->
    </object>
    <!--<![endif]-->
</object>

How can I check if the stub is working? In browsers, even if you turn off flash, it writes "click to run flash" on these blocks.

Answer 1

I deleted the flash and went from firefox (because there is a built-in flash in chrome that cannot be deleted). Everything tested.

Answer 2

chrome://settings/content/flash