I've never tried to embed Firebug Lite completely into a website, though I think to remember that Firebug Lite stores its configuration in a cookie. And I found some related code that seems to confirm that reading from a cookie called FirebugLite
. So, you may set those cookie values manually to configure it.
The other option you have is to change the default values of the options by adjusting them within the code.
Having said that, if you're using a browser, you should rather use the built-in developer tools, as they provide a much richer feature set and are continuously updated.
Also, the Firefox DevTools team is working on splitting their tools from Firefox, so that it's possible to use them in any browser. Though, at the moment, the only fully functional tool is the Debugger, and it requires to be run as a separate website (which doesn't seem to be possible for you if I understand you correctly).