Not sure if there's one, but you can do: Right click the page -> "View page info" -> Media -> Select the flash file from the list and hit "save as"
FlashGet for firefox is good, but you can always use CTRL U > CTRL F > .swf > Keep pressing 'Next' until you find the source file.
Well i know the Media thing but i'm looking for an easy way since there are many flash animations to save and in this way it will take many hours ....
If you have adblock, and flashget then just click adblock and then a search bar appear down your browser. Filter by typing ".flv" and you will see the source of the flv file. Just copy link and paste it in a new browser. You will have the file in ur drive in no time. (Is this what you asked?)