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Quote Colors & Collapse

Configure text and background colors of quotes in mail and news messages. From up addon version 3 (Thunderbird 91) you can collapse quotes.

Rated 5 out of 5 stars (15)
4,540 users

British-English Dictionary (GB)

A strict British-English spell checker dictionary for Firefox, Thunderbird and SeaMonkey. This dictionary only includes words conforming to the preferred standard of British-English spelling.

Rated 5 out of 5 stars (2)
29,117 users

Netiquette Checker

An integrated netiquette checker for EPITA students.

List all the netiquette rules that are not respected when writing an email.

Feel free to contirbute to the repository:
- https://github.com/d4ilyrun/netiquette

Not yet rated
7 users

Proton Mail Toolbar Button

Adds a Proton Mail button to the toolbar. The button simply opens a new tab with the https://mail.proton.me webpage.

Rated 5 out of 5 stars (3)
595 users

TileNote

Tile notes, I provide this web app. to Mozilla Thunderbird users.
This is a derivative of RainbowNote, 7 colorful week notes, with tile like shapes.

Not yet rated
55 users

archive-by-time

With the filter function comes with thunderbird, all emails met rules will be moved to a specific folder. As time passed the folder would grew bigger and I wanted to put all emails into sub folders classified by year.

Not yet rated
166 users

vault56 protection

vault56 protection protects against potentially malicious attached files and links. Links are rewritten to pass through vault56 URL protection servers and checked for trackers and malicious activity.

Rated 5 out of 5 stars (2)
61 users

External Editor Revived

Edit emails in external editors such as Vim, Neovim, Emacs, etc.

Rated 5 out of 5 stars (7)
374 users

Spellchecker Rumantsch Sutsilvan

Spellchecker Rumantsch Sutsilvan

Not yet rated
4 users

thundersort

Sort incoming mails into account folders based on the local part (based on regex)

Rated 5 out of 5 stars (1)
277 users

Microsoft 365 Link Opener

Open a shared link of a SharePoint or OneDrive file directly with the right app, instead of the browser.

Rated 5 out of 5 stars (1)
245 users

Open Google Keep

Adds an icon on the spaces toolbar to quickly open Google Keep

Rated 5 out of 5 stars (1)
276 users

GrapeVine for Salesforce

Connects Thunderbird to Salesforce.com

- Archive Emails from Thunderbird email accounts into Salesforce, automatically
- Type-Ahead search for Salesforce Contacts and Leads in compose/events
- Create Contacts/Leads in Salesforce from emails

Rated 5 out of 5 stars (1)
22 users

Proton Calendar Toolbar Button

Adds a Proton Calendar button to the toolbar. The button simply opens a new tab with the https://calendar.proton.me webpage.

Rated 5 out of 5 stars (8)
798 users

Spellchecker Rumantsch Surmiran

Spellchecker for Rumantsch Surmiran

Not yet rated
19 users

If This, Then! - IFTTT connector

*Trigger 'If This Then That' by message filters.
E.g.: On email with the file attachment xyz.log, send from sampledomain.com,
email body with text 'error 365', trigger action "error365" on IFTTT
IFTTT can push to web services, do home automation

Not yet rated
66 users

Mail Extractor

Mail Extractor for Thunderbird quickly extracts and copies email addresses from selected messages. It now also downloads attachments as ZIP files.

Rated 4 out of 5 stars (7)
516 users

Customoji

Adds easy custom emojis to Thunderbird.

NOTE: you need to add the emojis yourself in the extension settings

Not yet rated
30 users

GroupMe - Web Tab

This extensions opens a Thunderbird tab for the GroupMe web interface.

Not yet rated
9 users

Beeper Thunderbird Add-on

A simple add-on with a button in the Spaces toolbar.

I created this by reverse engineering one of the many good add-ons in the Mozilla store and replaced the URL with chat.beeper.com and a logo.

Requires an account with beeper.com

Rated 5 out of 5 stars (1)
14 users