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Link Properties Plus Requires Restart
Provides extended link properties: size of linked file, last modified time, etc.
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.
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.
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.
ExtendIMAPFilters
This addon extends filtering to read messages downloaded during an IMAP synchronization (bug 308148)
Expand mailing list recipients Requires Restart
Adds a toolbar button to expand address book lists to its recipients - useful to stripe out some of them when sending mail...
Forward Requires Restart
Add Inline / As Attachment option to Forward button and Message context menu.
ZNotes Requires Restart
Save everything you like. Simple text notes and pages downloaded from the internet, rich multimedia. Store any files and contacts from your address book with notes.
SavedSearchThemAll Requires Restart
A Thunderbird extension to automagically extend all the saved searches to all the foders!
TitleCase For Thunderbird Requires Restart
Transform strings into Title Case, Proper Case, Start Case, Camel Case, Upper Case, and Lower Case. Highlight your text and only changing what you highlighted.
To create your own collections, you must have a Mozilla Add-ons account.