The actions addon is not very useful unless you're on the addons action toolbar tab, there's nothing to notify you when actions are being logged. It would be a great improvement if there was some type of visual indication for when actions are being logged while you are on a different addon tab.

Something like this, but not ugly.

To me the most important feature would be having any type of visual indication, so whatever is simplest will probably be best. I prefer not to use alerts but currently some teammates are preferring it for the sake of having active feedback.

Another option, though much more involved, would be to mimic chrome devtools behavior for the actions output. In devtools, there is a dedicated console tab. But when you are in any of the other tabs such as Elements, Network etc, hitting the esc key open the console drawer. It would be interesting if the addons panel had a console drawer of it's own, and addons could log structured output to it, and a keyboard shortcut could toggle it.