Some browsers such as Firefox and Chrome may require you to [Allow] the extension plugin for Adobe Flash Player. The extension plug-in is a little banner for the Adobe plugin and will appear on your browser's URL tab. If it is appearing all the time then we suggest that you install and enable the Adobe Shockwave plugin and if it appears randomly then that usually means that it needs an update to a newer version.
Below is the step-by-step link for Firefox and Chrome to Install/enable it, and also update it as well!
(This link will work for MAC, PC, Linux systems)
Update Abobe Flash Shockwave Plug-In link for Chrome
(This link will work for MAC, PC, and Linux systems)
Update Adobe Flash Shockwave Plugin link for Firefox