Enable or disable any of the features. If any feature of this add-on clashes with another, or if you don't have a use for a feature, you can disable that feature.
You can disable the entire add-on by clicking on the 'Z' icon on the status bar; no need to restart Firefox. Click again to re-enable it. Disabling the add-on won't undo what's already done.
Right click on the 'Z' icon on the right side of your status bar to get the menu. Select 'Options...' to set the options.