Thanks Seb but what you describe does NOT work for me. To expand your explanation reply.....
1. I do that. It works as you say.
2. I do that and the style is not disabled, it is cleared. It disappears. It is removed from the style panel.
In addition , removing the style has no effect on the web page. So, if I say removed a color red, then the page would still reflect red. No difference.
I know how to use Firebug, I've been using it for ages with FFox. I'm using the Chrome version now on Win7. I'm using Firebug Lite 1.4.0.11967 and it is not working for me as it does with FFox. .
Thank you
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