I seriously can't believe this isn't part of those other tab management plugins.

Please optimize this extension for Firefox Android

It doesn't work well recently. It needs to be fixed.

This Extension is nearly perfect! The best of the duplicate tab closing extensions on Firefox. I would love to see a couple features that I think would push this into the perfect 5* range.

[1] Whitelist should be available with the 'do nothing' option so that it applies to the "Close All" button as well, so that I can exclude certain pages (such as New Tab or about:blank) but still use that option.
[2] Add the option to pop up a Notification on duplicate. Automatically removing tabs has caused me issues, so I do not use that feature, but I still would love an option to know when I am duplicating an existing tab in the moment.
[3] In the duplicate tab notification window it would be nice to have the options to close New or Old duplicated tab, or to do nothing.

Thanks for all the hard work!

-Shrunk mode bug-
when all options are unpinned and then all options are hidden by shrunk mode, I can't unhide them again. when I click shrunk mode button, nothing is happens.

Does exactly what it says on the tin. Quite essential if you've got loads of tabs open and tend to open the same stuff...

works great!!. Additionally one thing i want is that it should detect duplicate tabs in same container but different windows. When scope is selected as "container" i am able to open duplicate tabs for a particular container across different firefox windows.
i can select scope as "all windows" but then I will not be able to open duplicate tabs in different containers.

Update: Thanks for implementing this

It has all of the options I need like keeping the newer tab open or eliminating the search part from the url. Thank you!

This is an excellent add-on for us heavy tab users. One suggestion for an optional setting. Please make an option on the remaining tab (using the "Keep older tab" priority) to "Activate and move to first on the tab row," or "Keep and move older tab to first." So it would become the rightmost tab like when you open a new tab. Thanks.