Overview
Hours Ago Calculator Extension is a lightweight, offline Firefox addon that helps you quickly calculate time differences in both directions:
- Convert a number of hours into a past or future timestamp (e.g., “36 hours ago” → 2025-11-04 03:15:00).
- Convert a specific date/time into how many hours or days ago it occurred.
Perfect for time tracking, log analysis, scheduling, or simply satisfying your curiosity about “how long ago” something happened.
GET HOURS AGO CALCULATOR FIREFOX EXTENSION
Features
- Convert hours → timestamp and timestamp → hours ago instantly.
- Works entirely offline — no data ever leaves your browser.
- Copy results to clipboard with one click.
- Clean, responsive interface.
- No ads, no analytics, and no external connections.
Why it’s safe
- The extension does not collect or transmit any personal data.
- All calculations happen locally on your device.
Privacy Policy
Hours Ago Calculator values your privacy. This add-on is designed with privacy and security as top priorities.
1. Data Collection
This extension does not collect, store, or transmit any personal data, browsing history, or usage information.
All calculations and interactions occur entirely within your browser.
2. Permissions
The extension only uses the minimal permissions required to:
- Display the popup interface.
- Copy results to the clipboard (if you click “Copy”).
It does not access your browsing activity, websites, or any online data.
3. Internet Access
This extension works fully offline. It does not make any network requests or connect to external servers.
4. Data Sharing
No data is shared with third parties — because no data is ever collected.
5. Changes to This Policy
If this policy changes in the future (for example, to add optional online features), users will be notified through the add-on’s update notes and this page.
6. Contact
For questions or suggestions about this extension or its privacy practices, please contact the developer at jonathan@jocalendars.com