Show the number of Javascript and CSS nodes as a badge in the toolbar.
Initially beautifies source code. (Beautify modifies styling such as new lines, whitespace and indentation to make source more readable.)
You can control this on demand in the source view with a button or a keyboard shortcut 'b'.
Initially displays line numbers.
You can control this on demand in the source view with a keyboard shortcut 'n'.
Show caching information of external files. Picks the HTTP header "Expires", "Cache-Control" or "Age", in this order.
Show onclick handlers with inline javascript.
List of source files urls to hilight, one url match per line.
Adjust the look and feel of the extension with custom CSS. (See the available elements by inspecting the page.)