Web Developer Toolbar for Firefox
Toggle Web Developer Toolbar has been specially designed for web developers to provide easy to use methods to toggle Web Developer toolbar so that they can preserve their browser view area when they do not use Web Developer toolbar.
When installed Toggle Web Developer Toolbar places an icon in status bar automatically. Clicking on Toggle Web Developer Toolbar status bar icon will toggle Web Developer toolbar.
The same status bar icon functionality can be achieved by a Toolbar Button, too. You can add Toggle Web Developer Toolbar button by right clicking on any Navigation Toolbox button of Firefox, e.g. Home Button. Then choose Customize and drag the Toggle Web Developer Toolbar button and drop it on wherever you want in the Navigation Toolbox. Do not forget to click on Done button of Customize Toolbar Panel.
Even a smarter and faster toggle activity can be achieved by keyboard short-cuts. You can use CTRL + ALT + T keyboard combination to toggle Web Developer toolbar for Windows. COMMAND + Option + T is the keyboard combination for Mac users.
While you can use other methods to accomplish the same task, it is easier to have the Toggle Web Developer Toolbar with a smaller icon on status bar within easy reach or with a keyboard short-cut that provides faster activation. So while you review the add-on please consider that there are thousands of Firefox users that find Toggle Web Developer Toolbar useful. It is just matter of personal preference.