TabLimiter v1.0
Use this add-on to automatically limit the number of tabs used at any given time. Good for staying focused and de-cluttering your browser.
The tab number is automatically set to 7. To customize the maximum number of tabs allowed, click the browser action button, which is located in the top right of the browser, and change the number. You can also enable/disable the add-on with the adjacent on/off button.
Add-on icon made by Pixelmeetup from www.flaticon.com