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dictCheck Requires Restart
dictCheck - Double click on any english word in a page to get the polish meaning. Uses fast online dictionary.
Simple and easy! Enjoy!
Ethical signature Requires Restart
Add a button to the email composition toolbar, which lets you insert an ethical signature.
Thunderbird Chat Notification Requires Restart
Chat notification for Mozilla Thunderbird. Notification with alert (click on alert open conversation) and sound.
Check Domain Requires Restart
This extension is to display the warning dialog when you send mail for multiple domains.
Thunderbird Biff Requires Restart
This add-on provides a visual indicator of new Thunderbird mail availability in supported clients (Firefox, Sunbird) and Thunderbird itself. Note: you MUST install this add-on in BOTH Thunderbird and supported clients as there are both client AND ser...
Greek - English (US) Spelling dictionary
Combined Greek - English (US) spell checking dictionary for Firefox - Thunderbird - Seamonkey
Address Move Button Requires Restart
Allow you to add a Address Move Button to mail compose window.
DOM Inspector Plus! [dm] Requires Restart
Improved DOM Inspector! [dm version]. Box Model new layout & more data, see screenshot!. Horizontal scroll for Dom-Tree, and some more.
Inspects the structure and properties of a window and its contents.
Show Calendar Week Requires Restart
Shows the calendar week Thunderbird/Lightning calendar's moth and multi-week view.
Yet Another Remove It Permanently Requires Restart
Remove elements and block content on Web pages.
QFO - Quick Fuck Off Requires Restart
This extension serves the purpose of providing instant access to the FOAAS web service. FOAAS (Fuck Off As A Service) provides a modern, RESTful, scalable solution to the common problem of telling people to fuck off.
AttachExtraTools Requires Restart
This extension gives more options and tools to attach files from compose window.
HTitle (discontinued) Requires Restart
Hide title bar if window is maximized.
This add-on has been discontinued!
Legacy extensions support will be dropped in Firefox 57. If you interest in CSD on Linux, please track progress on https://bugzilla.mozilla.org/show_bug.cgi?id=1283299.
Extra Folder Columns Requires Restart
This extension is for those TB3 users who want the multiple-columns view that TB2 allowed
IMPORTANT: If you are using Thunderbird 38 or later, uninstall this addon. The functionality is in core now.
Český slovník kontroly pravopisu (bez diakritiky)
Slovník pro kontrolu pravopisu u textů bez diakritiky pro aplikace Mozilla
Thunderbird Taiga Integration Requires Restart
Convert mails to user stories, tasks and tickets for the Taiga project management system. See https://pehei.de/post/thunderbird-taiga-integration for instructions.
Tiny JavaScript Debugger
TinyJSD is a JavaScript debugger for privileged code running Mozilla products like Firefox, Thunderbird, SeaMonkey. It serves to debug the application as well as extensions written in JavaScript.
To create your own collections, you must have a Mozilla Add-ons account.