Once installed, you can append your site's
cpTrigger on to the end of any URI that belongs to a Craft element, and if
you're logged in and have permission, you'll be redirected to that element's edit page in the control panel.
You can set up a custom trigger value in a plugin config file, which will allow you to also edit the homepage this way.
In the plugin's control panel settings, you will find a bookmarklet link you can click-and-drag to your browser's bookmarks bar. This will allow you to visit the correct page in the CP for the current URL in one click.
To install this plugin, search for its package name on the Plugin Store and click “Install”.