Not needed since Thunderbird 38, but otherwise great Rated 5 out of 5 stars

Has served me well up to Thunderbird 38, where the functionality is built in:

• Expanded Folder Pane columns in New in Thunderbird 38.0 support article:
https://support.mozilla.org/en-US/kb/new-thunderbird-38#w_expanded-folder-pane-columns
• “Show expanded columns in folder pane” in release notes:
https://www.mozilla.org/en-US/thunderbird/38.0.1/releasenotes/
• Bug 464973 in Bugzilla:
https://bugzilla.mozilla.org/show_bug.cgi?id=464973

Just check View → Layout → Folder Pane Columns.

Rated 5 out of 5 stars

Awesome add-on ... and it turns out the "View => Layout => Folder Pane Columns" option/setting was greyed out as I neglected to remove Extra Folder Columns extension. All works well again. :-)

This user has 2 previous reviews of this add-on.

Fantastic addon. Rated 5 out of 5 stars

This addon is fantastic, I've been using it for years.

With the update to TB38, the addon is no longer needed, as the columns can be enabled in: View => Layout => Folder Pane Columns.

Thanks to the dev for making this addon, it was amazingly useful til now!

How to get extra folder columns back ? Rated 5 out of 5 stars

Extra Folder Columns is built in now, but in order to enable it, you must modify the key using the config editor. Go to Preferences/Advanced and select with config editor. Search for : mail.folderpane.showColumns
By default, the value is set to "false". Set the value to "true" (toggle on "false"). Restart Thunderbird. You will find the icon for the extra columns is in the right upper corner of the map panel (select unread/total/size).

Extra Folder Columns not available for Thunderbird 38.2.0 Rated 4 out of 5 stars

When updating T-bird I got this message: "Not available for Thunderbird 38.2.0" I have many mailboxes and archive folders. For overview I need to see by a glance how many emails there are, read and not read, in each mailbox and folder. This addon has shown to be exactly what I need and therefore I have had it on for about ten years.
Can you tell me when it will be avaliable for this new version of Tbird? Why can't it allways follow T-bird's updates?

Rated 5 out of 5 stars

In TB38, this is again standard functionality but hidden in View => Layout => Folder Pane Columns.

Thanks to the add-on developer for helping us out for such a long time.

Thanks Rated 5 out of 5 stars

I love this addon.
Thanks for your work!!

Rated 3 out of 5 stars

I inadvertently upgraded to Thunderbird 38.1.0 and LOST my Extra Folder Columns add-on. Comments and reviews are confusing: some say the function is built in, but following the directions does NOT WORK. Other reviews say "it doesn't work with TB38.1.0." Help me understand the reality! If built in please give instructions that work. If it isn't built in and a revised version of Extra Fiolder Columns add-on is requried, will there be an upgrade and an estimated date, or am I stuck with the less functional TB38.1.0!

Don Sherwood
DRSherw@attglobal.net

This user has a previous review of this add-on.

Available on Thunderbird 38.1.0 Rated 5 out of 5 stars

In Thunderbird 38.1.0, Folder Pane Columns is a built-in feature.
If you run with the traditional menu bar (selections at the very top of the window), the option is View | Layout | Folder Pane Columns .
If you use the application menu (an icon of three horizontal lines near the upper right of the window), the option is Options | Layout | Folder Pane Columns .
In some localizations, it might be Preferences | Layout | Folder Pane Columns .
But note that under the application menu, the Layout option is *not* under View.

This user has a previous review of this add-on.

No longer working Rated 5 out of 5 stars

I loved this addon, been using it for several years but since updating Thunderbird to version 38.1.0, this addon has been disabled because it's not compatible with that version. Will there be a new version soon? One that works with the latest version of Thunderbird?

Yes -- it does work. Rated 5 out of 5 stars

There is no "Options" menu. The way to get the extra column to appear is using the View menu .. View...Layout .. and then check Folder Pane Columns. And thanks to those who noted this issue.

Yes, built-in now! Rated 5 out of 5 stars

Yes, Extra Folder Columns is built in now, but in order to enable it you must modify with config editor the key

mail.folderpane.showColumns and set to true

ARB suggests to go to Options -> Layout -> click Folder Pane Columns but the option does not exist.

Rated 5 out of 5 stars

ARB and Unknownhtml said that tb 38.0.1 has Extra Folder Columns built in.
Great, but I can't find it in mine Dutch version.
Not under options and not under view, if mine translation is correct.

This user has 3 previous reviews of this add-on.

Built-in now -- corrected directions for use Rated 5 out of 5 stars

It's nice that it's built in now (although maybe I preferred the add-in's layout? Just me..). Here's how to enable it:

Options -> Layout -> click Folder Pane Columns

Then you can customize it at will.

Rated 2 out of 5 stars

upgrade for Thunderbird 38.0.1 please

No longer needed for 38.X -its built in under View -Layout - Folder Pane Columns Rated 5 out of 5 stars

I have used this since it was first published and will miss it but this functionality is now built into v38.x.

Go to View - layout - Folder Pane Columns and select -

Exactly like this add-on now just built back in...finally!!!

You will need to enable the MENU bar to see VIEW and select from there if you are using windows. I haven't checked out Mac options yet but will test on VM and report back later.

You do NOT need to enter any config editor option to enable.

Rated 5 out of 5 stars

I miss this functionality. Let me add my vote - please hurry and update this add-on so I can use it with Thunderbird 38.x

Extra Folder Columns Rated 5 out of 5 stars

Extra Folder Columns is such a great feature. PLEASE create a version compatible with 38.x!

Rated 5 out of 5 stars

PLEASE make it compatible with 38.x!!!!

This user has a previous review of this add-on.

Solution needed for 38.x (embedded function differs)! Rated 5 out of 5 stars

The following is not true -- there is a config setting called "mail.folderpane.sumSubfolders" which defaults to "true", when set to false it gives exactly what EFC gave me before, perfect!

This was my previous report, it's invalid now:
I hope the author will make an update (or adjusts the version) so the add-on can be installed on Thunderbird 38.1 -- I know that you can add folder columns natively in TB now but here you can only choose the "number of unread messages" or the "number of total messages" (including subfolders) -- but I need the number of "messages in the top level folders" (no matter if read or unread), my subfolders are all archives while the toplevel folders are "active". Thunderbird misses that value while EFC had it...