Add-ons
Filter Results
-
Category
-
Works with
-
Tag
489 matching results
Search
Sort by:
Aify
Rewrite or generate text based on promps using OpenAI's API.
Configure on settings page (make sure to save) and start to use when writing your emails!
You must have a payment method on record with OpenAI and an API key. OpenAI charge for use.
ThundAi Q/A - Ask your email Questions
AI-powered email search and question answering for Thunderbird. Search your emails with natural language questions. Use a ? to ask questions, otherwise it will default to search by keyword sorted most recent first.
Requires an OpenAI API key!
AutoZoom
Gemini Proofreader
This extension uses Gemini Flash 2.5 to proofread emails when the user clicks the extension icon.
Usage requires a Gemini API key. There is a free usage tier that should be more than adequate for almost every user.
OpenAI Proofreader
This extension uses OpenAI gpt-4o-mini to proofread emails when the user clicks the extension icon.
Usage requires an OpenAI API key. OpenAI does not offer a free usage tier. Proofreading a 4-5 paragraph email costs a fraction of a cent.
ThunderCalc
A simple calculator for Thunderbird/Sea Monkey/Firefox, available in a pop-up window or a separate tab.
Balochi Spellchecker for UniBal Script
This add-on is a Balochi spellchecker based on the UniBal Balochi script.
This is a pre-beta version as the dictionary has 1000+ words and not all Balochi Affix rules are implemented.
Please use it and give your feedback
Tatar spellchecker dictionary
Tatar dictionary for spell-checking in Firefox and Thunderbird.
Орфографический словарь Firefox и Thunderbird для проверки правописания татарского языка.
Lower Sorbian dictionary
Kiswahili Spell Checker
Babyish spellchecker
FileLink Provider for Box
Uploads your large attachments to your Box instead of sending them by email.
Open Tab
DontRestoreTabsRevival
This is a remake of the DontRestoreTabs extension. It is compatible with Thunderbird 88+. The code is based on the tabControl extension.
Seafile Filelink
Sender Domain
Adds optional columns to the messages pane.
Example : "abc@example.com"
* domain column -- "example.com"
* reverse domain column -- "com.example"
Bulk organize your messages by domain (eg. remove spam, back up, separate in folders)
PGPGeek
Quick & easy PGP encryption / decryption tool
* Save & use many public encryption keys to encrypt mail content
* Save & use many private decryption keys to decrypt mail content
Using openPGP.js
Open Source
https://github.com/pgpgeek/pgpgeek
ScrollAnywhere
Scroll without touching the scroll-bar!
Press Middle (Right / Left) mouse button anywhere on the page to scroll just like with scrollbar.
Features also:
- "grab and drag" scrolling
- customizable scrollbars!
- the Momentum auto-scroll
Contact Finder
Autocomplete a list of contacts when sending a message by searching their name in the address book.
Netiquette checker and wrapper
RFC 1855 compatible as well as Epita compatible.
This Addon provide a mail checker and an auto 72 column wrapper.
What is checked:
- Subject
- Greeting
- Body
- Salutation
- Quoting
- Signature
To create your own collections, you must have a Mozilla Add-ons account.
