Firefox only (Win/Mac/Linux): Firefox extension Options Menu makes accessing add-on settings panels much simpler by adding them to the Tools menu.
Once you've installed the add-on, you'll see a new Extension Options item on the Tools menu, with a list of all the extensions that provide a settings panel. Inside the settings for the Options Menu itself you'll find a lot of customisation, including filtering items on the list, and even showing the version numbers next to the menu items. It's a handy extension that makes accessing your settings a lot easier. Options Menu is a free download, works anywhere Firefox does.