Firefox Portable asking to install local plugins

[DragonPoet]

I am trying to customize my version of Firefox Portable. I am wondering how I can keep it so it doesn't ask or even recognize local plugins that are installed on the host OS? Such as flash, shockwave, etc. Any help would be greatly appreciated, and thank you very much.

 

[DragonPoet]

I found a page here, About:config entries - MozillaZine Knowledge Base, and if you look at the section under "Plugin." there is a entry beginning with "Plugin. scan. plid. all.", would modifying this entry in about:config be what I am looking for?