How to block Adobe Flash Player publicity (in web pages) with Adblock Plus Firef

Thanks if anyone can tell

Adblock Plus is an addon of Firefox

By default I believe ABP is set to block ads be they Flash or otherwise, I would suggest checking this out, http://adblockplus.org/en/faq.

This part in particular might be what you are looking for.
http://adblockplus.org/en/faq_basics#objects

The banner is an object (Flash or Java) and doesn’t have a context menu. What now?

Adblock Plus has an option called “Show tabs on Flash and Java”. When activated (the default) it will display a button saying “Block” at the upper right (lower right if there isn’t enough space) corner of every object. Clicking this button will block the object.

I would say your best bet would be the firefox add-on, NoScript, as that can block all Flash content, be it adverts or not.