Newest Extensions



Diese Erweiterung überprüft ungelesene E-Mails auf Spoofingversuche. Die E-Mails werden mithilfe von fünf unterschiedlichen Tests untersucht um deren Legitimität festzustellen. Die Tests werden einzeln erklärt auf der Einstellungsseite.

Not yet rated
1 user
Added May 14, 2020


GCalTab is a Thunderbird add-on that opens Google Calendar website in a Thunderbird tab. It features a beautiful dark mode thanks to the DarkReader algorithm.

Not yet rated
28 users
Added May 14, 2020


This is an extension function that classifies emails into multiple buckets using the Bayesian filter and tags them.

Rated 3 out of 5 stars (2)
6 users
Added May 6, 2020

TransliteRussian for Thunderbird

E-Mails auf Russisch auf der deutschen Tastatur in Thunderbird.
E-mails in russian on german keyboard in Thunderbird.
Пишем письма по русски на немецкой клавиатуре в Thunderbird.

Not yet rated
8 users
Added April 25, 2020

quicker quicksearch

make searching for emails faster:

Automatically insert into the quickfilter box: either the author or the email domain of the selected email.

No need to retype the address, if you want to search for all emails of this author in this folder.

Rated 5 out of 5 stars (1)
99 users
Added April 15, 2020

Add to Mailing list

Add the current email (sender) to an existing mailing list.

Not yet rated
125 users
Added April 14, 2020


A dynamic theme based on weather data from OpenWeatherMap.

Rated 5 out of 5 stars (3)
206 users
Added April 9, 2020

Expand mailing lists

Adds an 'expand lists' button to the compose window. It replaces all mailing lists with their contacts.

Rated 5 out of 5 stars (1)
3 users
Added March 28, 2020

FileLink for Plik

Upload large attachments to Plik and send the link by email

Not yet rated
226 users
Added March 20, 2020

Copy Address

Copy email address to clipboard.

Rated 5 out of 5 stars (2)
181 users
Added March 20, 2020

MyPhoneExplorer Requires Restart

This Addon is needed to sync your Android based smartphone with Thunderbird with the Software "MyPhoneExplorer"

Not yet rated
12,292 users
Added March 16, 2020


MessagePreview adds a column to the Thunderbird message list to display the message preview in a tooltip on column row icon mouse hover or a short preview in the column row itself.

Rated 5 out of 5 stars (1)
169 users
Added March 8, 2020

Restart Button

Adds a Restart Button, restarts Thunderbird

Rated 5 out of 5 stars (1)
374 users
Added Feb. 15, 2020

DevTools Button

Adds a DevTools Button, opens the Developer Toolbox

Not yet rated
59 users
Added Feb. 15, 2020

Toggle Message Pane

Adds a Preview Button, toggles the message preview

Rated 5 out of 5 stars (1)
164 users
Added Feb. 15, 2020

Config Button

Adds a Config Button, opens about:config in a dialog

Rated 5 out of 5 stars (2)
252 users
Added Feb. 15, 2020

Compact Headers

Limits displayed headers to 2 lines.
Adds a twisty to the header area.

Rated 4 out of 5 stars (1)
171 users
Added Feb. 15, 2020

Google Calendar Tab

Adds a button to open Google Calendar in a new Tab

Rated 5 out of 5 stars (4)
2,310 users
Added Feb. 11, 2020


BrowseInTab lets you open and browse any link in a Thunderbird content tab. Links are followed within the tab and back/forward navigation is supported.

Rated 5 out of 5 stars (3)
179 users
Added Feb. 10, 2020

Limit non-BCC recipients

Check that number of non-BCC recipients does not exceed a parameter.

Not yet rated
1 user
Added Feb. 5, 2020