11 Best Firefox Extensions to Supercharge Your Gmail Productivity

Firefox remains a top choice for privacy-focused users, and pairing it with Gmail unlocks serious potential. As a long-time Firefox enthusiast who's tested hundreds of extensions, I've curated these 11 standout Gmail add-ons. They draw from my hands-on experience boosting email workflows, much like the Chrome extensions we covered recently: 11 Chrome Extensions That Will Enhance Your Gmail Experience. Firefox-exclusive tools make it even better for loyalists.

These extensions tackle inbox overload, tracking, and more—proven to save time based on real-world use.

1. ActiveInbox: Schedule Emails and Turn Gmail into a Task Manager

For power Gmail users, ActiveInbox ($50/year) fills key gaps with features like email scheduling, task creation, due dates, and follow-up reminders. It's superior to alternatives like Boomerang for managing to-do lists: How to Deal with Inbox Overload and Email To-Dos.

Download: ActiveInbox for Firefox

2. Notifus: Reminders for Unanswered Emails

This free extension prompts reminders for emails needing replies. Swap 'Send' for 'Send & Remind in X Days'—simple and effective. Requires Greasemonkey.

Download: Greasemonkey for Firefox | Notifus for Firefox

3. Checker Plus for Gmail: Notifications Without Keeping Tabs Open

Add a toolbar icon for instant new mail alerts, quick read/mark/delete actions, and a dropdown mobile Gmail view—ideal if you multitask.

Download: Checker Plus for Gmail

4. Mailtrack: Track If Your Emails Are Read

Free and unlimited, Mailtrack shows delivery (single green check) and read status (double check) for crucial messages. Effortless tracking.

Download: Mailtrack for Firefox

5. Gmail Simple Notes: Private Sticky Notes on Emails

Add customizable sticky notes to messages (fonts, colors, even calendar events). Securely stored in your Google Drive—no third parties.

Download: Gmail Simple Notes for Firefox

6. Trimless for Gmail: View Full Messages Without Trimming

Gmail often cuts signatures or threads—Trimless displays everything complete. It excels at this single, vital task.

Download: Trimless for Gmail for Firefox

7. Gmail Mail Sidebar: Inbox in Firefox's Customizable Sidebar

Leverage Firefox's sidebar strength (like All-in-One Sidebar) with mobile Gmail always accessible—mimics your phone app seamlessly.

Download: Gmail Mail Sidebar for Firefox

8. Shortcuts for Gmail: Extra Keyboard Shortcuts for Speed

Master Gmail shortcuts (5 Shift Key Shortcuts All Gmail Users Should Know), then add 12 more: select content, expand threads, navigate links, undo, and more.

Download: Shortcuts for Gmail for Firefox

9. DNDEmail: Block Distracting Notifications

Silence new mail alerts during focus time—batch check hourly, whitelist VIPs like your boss. Boosts productivity: How to Turn Off Distracting Notifications.

Download: DNDEmail for Firefox

10. WiseStamp: Professional, Rich Email Signatures

Elevate beyond basic signatures with photos, social links, and easy customization. Full guide: How to Spice Up Your Email Signatures with WiseStamp.

Download: WiseStamp for Firefox

11. Grammarly: Real-Time Spell and Grammar Checker

Professional emails demand perfection—Grammarly flags errors across Gmail and everywhere else (Facebook, forums). Like Word's underlines with smart suggestions: Grammarly Lite for Proofreading.

Download: Grammarly for Firefox

What Did We Miss?

Explore more at The Best Firefox Addons. These are my top picks for Gmail after rigorous testing—which ones power your workflow?