One thing that comes to mind is an option to toggle it to operate either in "always-on sidebar" or "on-demand plugin button" mode.
To riff on what metabeard suggested, another configuration option that could be presented to the user might be something like "domain-specific preferences for always-on or on-demand" so that certain websites are always excluded/always excluded.
To riff on what metabeard suggested, another configuration option that could be presented to the user might be something like "domain-specific preferences for always-on or on-demand" so that certain websites are always excluded/always excluded.
-Will