We’ve covered Deduplicate -tabs extension in the past that alerts you with its icon when duplicate tabs were found and allows to remove them with a single click, how about automating this? meet Duplicate Tabs Closer add-on for Firefox which detects duplicate tabs and automatically closes them and further more switches to original tab.
Firefox Duplicate Tabs Closer add-on
Duplicate Tabs Closer comes enabled by default with two options: 1. activate existing tab and 2. close duplicate tab automatically.
Let me explain these clearly for you: when a duplicate tab is detected in Firefox it will be automatically closed (second option) and activates original tab (first option).
You can disable second option so that you’ve to manually click on add-on button to close them.
Have you found this add-on useful? share with us in comments.