I use Netscape which is a derivation of firefox now.

The working pages have this source code:

<PARAM NAME=movie VALUE="f_walkcycle.swf">
...
<EMBED SRC="f_walkcycle.swf"

means identical names for source and value

http://www.puppenheim.org/
http://www.wuerfels-welt.de
Old Game Tutorial: http://www.puppenheim.org/MITutorial.zip
Free Game Editor: http://puppenheim.org/AlienalsWeihnachtsmann.zip
http://www.puppenheim.org/blender_starting_main_settings.txt