Google Calendar Sidebar by Seraphim

Google Calendar Sidebar adds a fast, elegant calendar pane to the right side of Firefox, inspired by the productivity layout found in Microsoft Outlook.

Instead of switching tabs, you can view your schedule, browse upcoming events, and jump to specific days — all while staying focused on your current page.

Key Features

Right-side Firefox sidebar for always-available calendar access

Mini month view with visual indicators for days that contain events

Agenda view with:

7-day overview

Single-day focus mode

Previous / next navigation

Multiple calendar support
Select which Google calendars to display using simple checkboxes

Today, refresh, and quick navigation controls

Click events to open them directly in Google Calendar

Privacy & Security

Uses Google’s official OAuth sign-in flow

Requests read-only access to your Google Calendar

No tracking, analytics, or data collection

Calendar data is processed locally and only used to display events

No information is shared with third parties

Designed for Productivity

This add-on is ideal for users who want Outlook-style calendar visibility without leaving Firefox — perfect for work, scheduling, and multitasking.