After making a big update to an Umbraco site I work on, it became slightly annoying having to add umbdebugshowtrace=true to every page in order to show the debug. As a result, I’ve setup a basic Firefox extension to automate the task. A button is added to the status bar which reloads the current page with the debug showing underneath when you click on it.
The plugin can be downloaded from here: addons.mozilla.org/en-US/firefox/addon/umbraco-debug/
Below is an example of the debug on the Umbraco.tv homepage: