worked on it until late last night with no success. I tried ivandi's patch and it didn't work for me. I then installed hal-flash from sbo with no joy. I looked at everything I could think of between the computer that works. when firefox is run from cmd line the error is

"Gconf error client failed to connect to D-Bus daemon."

When firefox is started that is the only error I get, there are no errors when I try to open a flash item it just stalls with the

"Something went wrong error inside the video screen.

I am not using a firewall or the no script addon..

Have you tried a new user or profile on the computers that aren't working? It could be an issue with your user or Firefox profile preventing the plugin from working.

my bad. I think they frozen the 64 bit plugin but I am far from IP to date.

Slack64 Current: I have had both libflashplayer.so and libvlcplugin.{la,so} in /usr/lib64/mozilla/plugins for ages and never had any conflicts.
The OP's remark about only the 32-bit box working rang a bell: on 64-bit boxes I need a symlink /usr/lib/mozilla -> ../lib64/mozilla to make Firefox even "see" these two plugins.

I added user and tried the suggestion for a new profile again that did not work for me. I then tried to make a symlink to libflash, although I am not sure the symlink is correct. I did try about 6 different links. with no results. I do appreciate the help from so many. I am still trying to solve the problem. any help?

The symlink should be for the directory, not for libflash. So issue in a terminal window: Whether or not you need this symlink can easily be checked by clicking in Firefox on "Open menu" (the three dashes) and then on "Add-ons". If without this symlink you do not see the "Shockwave Flash" and "VLC Web Plugin" plugins you need it, otherwise you do not.


Edit: I just realized that I use the binaries from https://www.mozilla.org/en-US/firefox/all/ (just unpack that tar.bz2 and symlink /usr/bin/firefox), not the Slackware package. With the Slackware package the /usr/lib/mozilla symlink is not necessary.

I'm not sure that symlink is needed. It was previously, I know. In /usr/lib/mozilla/plugins I had run I renamed the /usr/lib/mozilla/plugins directory, restarted firefox, and everything important still shows in aboutlugins.