The little sister of Firebug is a standalone Javascript tool -> Firebug lite
or hosted
https://getfirebug.com/firebug-lite.js
There are some options to set: https://getfirebug.com/firebuglite#Options
so i included the js into my index.html and users without Firebug can now inspect my page.
But how do we edit the html with firebug lite?
There is not yet an option to edit html in firebug lite. Unfortunately.