[5] Flashblock allows users to prevent page elements, such as HTML object tag browser plug-ins and advertisements, from being displayed.
Flashblock neither stops the download of Flash content nor does it prevent its execution completely.
[7] Flashblock provides a mechanism that allows users to display the blocked elements by clicking on them, or by whitelisting.
[6][8] In 2006, InformationWeek recommended Flashblock, and described it as one of the most popular Firefox extensions.
[11] It was reviewed by download.com in 2011,[12] by Softpedia,[13] and in 2016 Tomsguide.com included it in its "40 Best Firefox Browser Add-Ons".