Rated 5 out of 5 stars

If you want a 'Mark All Read' button for Thunderbird 78+ install https://addons.thunderbird.net/en-GB/thunderbird/addon/next-unread-group/ and change the value for mailnews.nav_crosses_folders in about:config from 1 to 2.

Rated 5 out of 5 stars

There is a way to "mark all read":
Choose "mark" on the Thunderbird and then choose "mark all read" from the dropdown menu that appears.
The downside (aside from needing several mouse actions) is that a message must be selected for the "mark" button to be active. The keyboard shortcut "shift-c" does not have this restriction.

Rated 3 out of 5 stars

Does not work with Special Folders in Thunderbird 78: see https://bugzilla.mozilla.org/show_bug.cgi?id=1687113

Rated 5 out of 5 stars

I have a version now working in TB78 - done by the developer of CardBook. Apologies to Mark S. Baines ...

If anybody is interested, pls send a mail to "markallread <at> 1cm dot eu" and I will send it to you.

Chris

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

Rated 5 out of 5 stars

Was using old version but it stopped at 68.3.1 update. Just installed this one and it works great. Really useful to clear all the 'unread' clutter at once.

Rated 4 out of 5 stars

Really miss this excellent addon. Still not working in Thunderbird 68.3.1. There is no uption to Mark All Read either on the toolbar or in the drop down menu. Hope that it is fixed soon.

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

Rated 4 out of 5 stars

Tried DS's fix, couldn't get it working. Any chance of just uploading the final xpi?

This review is for a previous version of the add-on (0.7.2). 

Rated 5 out of 5 stars

Thank you for your update. Its only disadvantage: It does not harmonize with the add-on 'Rise of the Tools'. When the latter is activated the buttons are gone after a restart of TB (68.2.0).

This review is for a previous version of the add-on (0.7.2). 

Rated 5 out of 5 stars

Dear @DS, your suggested edit works perfectly on v68. Thank you so much.

Oh, except that it seems to disappear from the TB toolbar each time I restart TB :(

Further investigation shows it only does not persist on the Menu Bar (which is where I always have located it). It remains ok on the Mail toolbar, though.

TB68.2.0 64 bit

This review is for a previous version of the add-on (0.7.2). 

Rated 5 out of 5 stars

Can not ,ake it works with TB 68.1, any suggestion?

Thanks, Claudio.

This review is for a previous version of the add-on (0.7.2). 

Rated 5 out of 5 stars

@DS this works. Thanks...

This review is for a previous version of the add-on (0.7.2). 

Rated 5 out of 5 stars

Here are instructions to make this addon work with TB 68. . .

------------------------------

1. Unzip the .xpi file (change extension to .zip to extract natively, or use 7-Zip or other extractor).

2. In extracted root folder, create the file "manifest.json" in a text editor and populate as follows (first bracket to last bracket):

{
"manifest_version": 2,
"name": "Mark All Read Button",
"description": "Adds toolbar buttons to mark all emails or threads as read.",
"version": "0.7.2",
"applications": {
"gecko": {
"id": "{DA506923-55C4-4fbe-9E4C-D24B80D7DE9F}",
"strict_min_version": "68.0"
}
},
"author": "Mark S Baines",
"homepage_url": "http://www.linnhe.net/thunderbird/extensions.html",
"icons": {
"32": "chrome/skin/icon.png"
},
"legacy": {
"type": "xul"
}
}


3. Save the file. Note that the JSON syntax is *very* finicky, and so much as one misplaced punctuation mark may cause the addon not to load. Copy and overwrite this addon's info over a manifest from a working TB 68 addon if you run into trouble. (Note: this is a single-language manifest, since the original addon was not localized.)

4. Open "chrome.manifest" from the root folder in a text editor. Search and replace the following string (NOTE: -'s and +'s are for illustration only):
- style chrome://global/content/customizeToolbar.xul chrome://markallreadbutton/skin/markallreadbutton.css
+ style chrome://global/content/customizeToolbar.xul chrome://markallreadbutton/skin/markallreadbutton.css appversion<59.0a1
+ style chrome://messenger/content/customizeToolbar.xul chrome://markallreadbutton/skin/markallreadbutton.css appversion>=59.0a1

5. Save file.

6. ZIP up addon, keeping complete folder structure. Change .zip extension to .xpi.

7. Install in TB 68.

------------------------------

On casual test works like it always did, without triggering the Error Console. Note that most of this author's simple button addons hosted here and on his external website should be easily modifiable for TB 68 using this same method.

This review is for a previous version of the add-on (0.7.2). 

Rated 1 out of 5 stars

This does not work with subfolders.. pl. make it work with folder and all its subfolders..

This review is for a previous version of the add-on (0.7.2). 

Rated 5 out of 5 stars

Please add "mark all read folders" in inbox folder unified view.
Thank's

This review is for a previous version of the add-on (0.7.2). 

Rated 1 out of 5 stars

Thunderbird 60.5.3.

Verstehe dieses Add-On nicht. Um einen Ordner als gelesen zu markieren, braucht man kein Add-On. Das kann Thunderbird ganz alleine. Was Thunderbird nicht kann, ist Unterordner ebenfalls als gelesen zu markieren, was aber auch dieses Add-On nicht beherrscht. Ich hatte gehofft, hier einen Ersatz für das nicht mehr aktive MarkSubfolders zu bekommen. War leider nichts.

I don't get the point of this Add-On. It is possible to mark folders as read without any Add-On. It is indeed not possible to mark subfolders as well but this Add-On doesn't do that either. I was hoping to get an alternative for MarkSubfolders, which unfortunately is not under active development anymore. Sad to say that this one is useless.

This review is for a previous version of the add-on (0.7.2). 

Rated 5 out of 5 stars

Endlich haben wir wieder einen Button, um ein ganzes Verzeichnis als "gelesen" zu kennzeichnen. Die alten Add-ons liefen alle nicht mehr unter aktuellen Thunderbird- Versionen.

This review is for a previous version of the add-on (0.7.2). 

Rated 5 out of 5 stars

The button is displayed and placed on the panel, but does not work. Ver 0.7.2 + TB 60.2.1

This review is for a previous version of the add-on (0.7.2).  This user has a previous review of this add-on.

Rated 5 out of 5 stars

Great add on. Just disabled with v 60+ But shub (below) has an easy fix. Same might apply to other add ons disabled by latest update (I tried it on also disabled Apply Last Colour and it worked!)

This review is for a previous version of the add-on (0.7.1). 

Rated 5 out of 5 stars

Love this add-on, Miss it as it no longer works with the latest update

This review is for a previous version of the add-on (0.7.1). 

Rated 5 out of 5 stars

Find a way to install it... (working on version 60.0b11 (32-bit)
Donwload the file mark_all_read_button-0.7.1-tb
Change extension to zip
Unzip the file.
find the file install.rdf
Edit install.rdf replace ligne 27 <em:maxVersion>31.*</em:maxVersion>
by
<em:maxVersion>60.*</em:maxVersion>
save the new install.rdf
Zip again all the files
install it... Good luck...

This review is for a previous version of the add-on (0.7.1).  This user has a previous review of this add-on.