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Outlook/Teams Appointments
Get the hidden appointment from an email from outlook/teams as a .ics-file - Icon: https://fontawesome.com/
G Suite in tab
Now you can open G Suite App in Thunderbird tabs. (Calendar, Contacts, Keep, Task and Drive)
Open Google Calendar
Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)
Iranian Date For Thunderbird Requires Restart
Adds a new Iranian(Persian/Jalali) date column to Thunderbird.
Todo.txt Requires Restart
Thunderbird extension for the Todo.txt application
Lightning Colors Reminder Requires Restart
Let's show the calendar color on Lightning reminders!
Purge Events Plus Requires Restart
Purge events from Sunbird and Lightning files and thereby cleanes the calendar
Google Calendar Tab
Adds a button to open Google Calendar in a new Tab
ReminderFox Requires Restart
ReminderFox zeigt und verwaltet Listen von Erinnerungen und Aufgaben. ReminderFox nutzt einfach zu verwendende Listen mit Warnungen/Alarmen, um Sie an alle Ihre wichtigen Termine zu erinnern.
Reminderfox synchronisiert auch mit anderen Kalendern
Custom sync interval for Lightning Calendar Requires Restart
Allows custom synchronization intervals for remote calendars imported by Lightning Calendar (no fiddling in about:config necessary)
M-Hub Lite
Add Microsoft Office 365 Tabs to Thunderbird! Services supported by M-Hub Lite: Calendar, People, OneDrive, Word, Excel, PowerPoint, & Bing. Need business or enterprise support? Get M-Hub Pro: https://www.schiffner.com/software/m-hub-pro
G-Hub Lite
Google Tabs for Thunderbird! G-Hub Lite supports Calendar, Contacts, Drive, Docs, Sheets, Slides, Maps, Search, & Voice. Need Google Workspace support (formerly G Suite)? Check out G-Hub Pro: https://www.schiffner.com/index.php/software/g-hub-pro
Enhanced Date Formatter Requires Restart
Configure the 'Date' and 'Received' columns and displayed date in the message pane using custom formats. You can even use different date formats for emails with today's date, yesterday's date, dates in the last week, or dates older than a week.
lightningWeather Requires Restart
LightningWeather shows the weather forecast in the background of the calendar so you can easily coordinate your activities with the weather.
Show Outlook Appointments (vcal / ics) Requires Restart
An extension to show embedded Outlook calendar (vcal / ics) parts.
Thunderbird doesn't show calendar parts from Outlook appointment emails. This addon adds a button to download the embedded appointment as ICS to import it into another calendar.
Zonio Freebusy for Lightning Requires Restart
Finds when are people available for a meeting or event via Zonio Freebusy service. Displays freebusy blocks instantly in Invite Attendees window while attendees are being added. Works with both local calendar storage or any calendar provider.
Reply Monitor Requires Restart
**This is NOT COMPATIBLE with Thunderbird 31 or newer versions**
Keep track of your emails and replies (Lightning is required).
Note: the name of this add-on has been changed to Reply Monitor because the previous name is a registered trademark.
Events spanning multiple days Requires Restart
Displays multiple day events as a "spanning" event, without borders of the day-elements inside the month- and multiweek-view.
Gantt View Requires Restart
Gantt Chart view for Sunbird/Lightning
Om eie versamelings te bou, is 'n Mozilla-byvoegingsrekening nodig.