Komodo HacKit is Hacking Kit used to hack komodo itself :)
Nothing special add's about:config and error console buttons in tools sub menu hacKit
Besides submenu hackKit simulates firefox tools menu (Has a same id)
So basically all the extensions which doesn't require any specifics from firefox can be easily added even without changing even chrome.manifest files (Usually mozilla toolkit extensions work fine) it also has menu DOM Inspector but you still need to install it to use it. DOM Inspector from firefox will perfectly feet :)
How to install DOM inspector into Komodo?
You can install Dom Inspector from
https://addons.mozilla.org/en-US/firefox/addon/6622
Unfortunately you still need to modify chrome manifest file inside .xpi file
you have to remove "application={ec8030f7-c20a-464f-9b0e-13a3a9e97384}"
You can use the same technique for other firefox extensions compatible with mozilla toolkit