Rated 4 out of 5 stars

Great Addon, helped me a lot while refactoring thousands of contacts I've collected through years. It would be great always to see all fields even they werr ignored when comparing so it would be easier to understand the differences between two contact entries when all compared fields might be the same.

As written in the documentation:
It has been a deliberate decision not to show all fields by default for the sake of better overview when comparing.
The most usual and important fields are always shown.
There is a list of field types that are always hidden, which is pre-configured with those rather obscure technical fields rather anyone would like to see, and which you have the freedom to adapt.
The remaining types of fields are shown whenever there is a difference in their values.
So you should not really miss anything.

Rated 4 out of 5 stars

This plugin does not work with Thunderbird 68.1.0 Please add support. Thank you!

This review is for a previous version of the add-on (1.1).  This user has a previous review of this add-on.

The add-on meanwhile supports Thunderbird 68+. So you may consider updating your review.

Please report any issues on https://github.com/DDvO/Duplicate-Contacts-Manager/issues/ rather than (ab-)using the list of reviews, which I do not track regularly, for this purpose.

Rated 4 out of 5 stars

Very helpful. Would really appreciate being able to have "remove BOTH" as an option.

This review is for a previous version of the add-on (1.1). 

Thanks for your comments. Please report any issues on https://github.com/DDvO/Duplicate-Contacts-Manager/issues/ rather than (ab-)using the list of reviews, which I do not track regularly, for this purpose.

Rated 5 out of 5 stars

Works great with Thunderbird 60.5.1 (64 bits) on LinuxMint

This review is for a previous version of the add-on (1.1). 

Pleased to hear, thanks!

Rated 5 out of 5 stars

Excellent add-on with detailed specification and prompt support. Highly recommended.

This review is for a previous version of the add-on (1.1). 

Rated 5 out of 5 stars

Superb product - lost all of my Thunderbird contacts, but use Gmail, so they still existed, although without subfolders. Imported into Thunderbird as VCF, de-duped and edited 400+ contacts to 201 contacts in less than an hour. (gContactSync 3.0.x seems to broken, and Duplicate Contacts Manager filled the gap - and did much more.)

This review is for a previous version of the add-on (1.0.6). 

Rated 5 out of 5 stars

Exactly what I needed to keep my contacts straight. Not too simple, enough functionality for a large collection of contacts in many lists.

This review is for a previous version of the add-on (1.0.5). 

Rated 5 out of 5 stars

Very clear and informative way of deleting duplicates across address books. I love it.

This review is for a previous version of the add-on (1.0.3). 

Rated 4 out of 5 stars

This Add On seems not to work, if you don't switch TB to English language. If you however do so, it works fine.
PLEASE PLACE A NOTICE IN THE DETAILS ABOUT THE ADD ON at least.

This review is for a previous version of the add-on (1.0.1).  This user has a previous review of this add-on.

The language issue has been resolved in version 1.0.3.

Rated 5 out of 5 stars

Worked smoothly, and actually came up with 15 duplicates i had overlooked. very efficient way to review and clean up.

Run it via option under the tools menu...

This review is for a previous version of the add-on (1.0.1).