Email Firefox add-ons

Email clients and tools for the inbox: tracking, templates, temporary addresses. 509 live add-ons carry the topic.

Tags come from each listing's name, category and description, read in English: a listing written in another language is tagged only where it uses the English words.

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  1. Checker Plus for Gmail™↗

    by Jason Savard · updated 2026-09-22

    Get notifications, read, listen to or delete emails without opening Gmail and easily manage multiple accounts.

    Appearance ★ Featured v36.5.2
    Daily users 36,577 +194 wk
    Rating 4.3 619 ratings
    Growth · week +194 weekly avg over 14 days

  2. SimpleLogin: Open-source Email Protection↗

    by SimpleLogin & Proton Pass team · updated 2025-04-01

    Create a different email for each website to hide your real email. Guard your inbox against spams, phishing. Protect your privacy.

    Privacy & Security v3.0.7
    Daily users 10,377 +84 wk
    Rating 4.8 209 ratings
    Growth · week +84 weekly avg over 14 days

  3. Pinned GMail↗

    by Alejandro Brizuela · updated 2023-06-30

    Go to the pinned GMail tab. If it doesn't exist, it's created. It also alerts you the unread emails.

    Social & Communication v2.4.0
    Daily users 5,770 +75 wk
    Rating 4.4 47 ratings
    Growth · week +75 weekly avg over 14 days

  4. Gmail™ Notifier (restartless)↗

    by InBasic · updated 2026-10-12

    Multiple account (or label) Gmail notifier (without storing passwords)

    Privacy & Security v1.2.5
    Daily users 19,476 +75 wk
    Rating 4.1 369 ratings
    Growth · week +75 weekly avg over 14 days

  5. Seznam Doplněk – Email↗

    by Seznam.cz, a.s. · updated 2025-02-10

    Seznam Doplněk – Email vás upozorní, když přijde nový e-mail, a zjednoduší práci s více Seznam účty.

    Alerts & Updates v6.4.1
    Daily users 3,547 +68 wk
    Rating 2.3 52 ratings
    Growth · week +68 weekly avg over 14 days

  6. Email Sent Dark Souls style↗

    by Valeriy Komlev · updated 2026-05-01

    Dark Souls style notification for Gmail. Receive epic "Email Sent" notification once you send you email in Gmail.

    Alerts & Updates v2.7
    Daily users 3,435 +38 wk
    Rating 4.8 32 ratings
    Growth · week +38 weekly avg over 14 days

  7. Temp Mail - Disposable Temporary Email↗

    by Privatix · updated 2022-08-18

    Temporary disposable email address. Protect your email from spam, bots and phishing with Temp-Mail.

    Privacy & Security v0.0.34
    Daily users 8,155 +37 wk
    Rating 4.8 329 ratings
    Growth · week +37 weekly avg over 14 days

  8. Gmail reverse conversation↗

    by Tomasz · updated 2025-11-23

    Gmail reverse conversation view. Do you like newest message on the top in conversation view? Now you can do it with this simple add-on.

    Appearance v0.0.16
    Daily users 2,956 +27 wk
    Rating 4.8 43 ratings
    Growth · week +27 weekly avg over 14 days

  9. SignalHire - find email or phone number↗

    by SignalHire · updated 2021-08-27

    SignalHire extension helps to find emails and phone numbers on LinkedIn and other social and business networks

    Search Tools v4.0.25
    Daily users 2,506 +26 wk
    Rating 4.4 48 ratings
    Growth · week +26 weekly avg over 14 days

  10. Search and Wider Mail by Yahoo↗

    by Yahoo! · updated 2021-01-07

    Expand your Yahoo Mail inbox. Set Yahoo as your default search and enjoy a wider view. Wider mail experience works only with Yahoo as the default search engine.

    Search Tools v1.2.1
    Daily users 2,841 +19 wk
    Rating 3.4 94 ratings
    Growth · week +19 weekly avg over 14 days

    Unrated listings show no rating rather than zero — the store renders 0 out of 5 for never-rated items, and storing that as 0.0 would drag every category average down. Blank install counts are equally real: themes never show a count, and many small extensions don't either. Delisted listings are excluded from these views but retained in the database.