Trello Card Checker by ReDa
Never miss a deadline again — get notified the moment something is overdue and handle it without leaving your browser.
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About this extension
Ever miss a deadline because you simply forgot to check?
This extension keeps track of your tasks and alerts you the moment something is overdue — so nothing slips through the cracks. It uses Trello as the underlying planning tool, making it easy to organise, schedule and stay on top of what matters.
Open the popup and everything you're late on is right there — no tab switching, no context loss.
What you can do from the popup:
• See all overdue tasks at a glance, with how many days past due
• Mark a task as done with one click
• Reschedule any task using a built-in calendar picker
• Archive tasks you no longer need
• Snooze alerts for 30 min, 1 h, 2 h or 4 h when you need focus time
• Create a new task dated for today without leaving the browser
• Switch between multiple boards instantly from the popup
Background behaviour:
• Checks automatically between 08:00 and 18:00
• Polling frequency is configurable from 1 to 60 minutes
• Settings sync across all your Firefox instances via Firefox Sync
Setup takes about 2 minutes — you just need a free Trello account and an API key from trello.com/app-key.
This extension keeps track of your tasks and alerts you the moment something is overdue — so nothing slips through the cracks. It uses Trello as the underlying planning tool, making it easy to organise, schedule and stay on top of what matters.
Open the popup and everything you're late on is right there — no tab switching, no context loss.
What you can do from the popup:
• See all overdue tasks at a glance, with how many days past due
• Mark a task as done with one click
• Reschedule any task using a built-in calendar picker
• Archive tasks you no longer need
• Snooze alerts for 30 min, 1 h, 2 h or 4 h when you need focus time
• Create a new task dated for today without leaving the browser
• Switch between multiple boards instantly from the popup
Background behaviour:
• Checks automatically between 08:00 and 18:00
• Polling frequency is configurable from 1 to 60 minutes
• Settings sync across all your Firefox instances via Firefox Sync
Setup takes about 2 minutes — you just need a free Trello account and an API key from trello.com/app-key.
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Permissions and data
Required permissions:
- Display notifications to you
Optional permissions:
- Access your data for api.trello.com
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 2.6
- Size
- 357.08 KB
- Last updated
- 9 days ago (May 19, 2026)
- Related Categories
- License
- Mozilla Public License 2.0
- Version History
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