Thanks, Giorgio, but I actually searched the forums and google before I posted here.

I downloaded the latest normal version of firefox (instead of the beta), installed it (on my laptop, with a clean profile, instead of creating a portable version from the official install with the portable profile I normally use), installed the latest version from NoScript and Firebug (instead of the newest version from firebug, not yet published on the add-ons website), and did not install all my other add-ons, so I'm really honestly just trying to understand what is going on here...

So I'm curious to why my firebug keeps showing only this script, after a first time reloading my page. And why can't I use my firebug console any more (not even simply throwing a console.log message) once this code is listed in my javascript panel? Could be that it is a firebug problem, but still, never saw this code coming up before, untill yesterday night. So, is this actually a change from last night? And if, isn't there something going terribly wrong?
Try it yourself:
install firefox
install firebug and noscript
enable firebug, enable noscript
go to a webpage
enable all the scripts on that page
open up the firebug console, run the code "console.log('hello world');"
see the line "console.log('hello world')", followed by the line "hello world" in the console
reload the page
run the code "console.log('hello world');"
see only the line "console.log('hello world')"
Something definitely is going wrong
