Hi,<p>Author of extension here ... This extension is already available in chrome and I just ported to Firefox since I recently started using Firefox as my primary browser since quantum ... This is intentionally a offline only extension designed mainly for having in browser reminders which sits nicely between paper/pen notes and a cloud synced note taking app ... I don't want to sync stuffs to cloud to have transient reminders ...<p>You can view the source here - <a href="https://github.com/palerdot/remindoro" rel="nofollow">https://github.com/palerdot/remindoro</a><p>And chrome extension here - <a href="https://chrome.google.com/webstore/detail/remindoro/njmniggbfobokemdjebnhmbldimkofkc" rel="nofollow">https://chrome.google.com/webstore/detail/remindoro/njmniggb...</a>