They only mention “open extension ecosystem”

• The title: “Prepare your Firefox desktop extension for the upcoming Android release”
• End of the first paragraph: “Here’s everything developers need to know to get their Firefox desktop extensions ready for Android usage and discoverability on AMO…”
• End of the second paragraph: “so why not start optimizing your desktop extension for mobile-use right away?”

also I haven’t found an extension not working on mine yet I have even installed a flash player extension for flash games on my browser so no opinion on those statements

And those were installed from the mozilla addon library? With full support for a mobile interface? And you tried every extension available?

I have even installed a flash player extension for flash games

Flash used to be a mobile extension…

It’s desktop extensions. Most mobile browsers only support a subset of all available extensions (including Firefox!). Now, Firefox will support its whole library of extensions.