To use Android extensions, you'll need Firefox for Android. To explore Firefox for desktop add-ons, please visit our desktop site.

Log in

850 extensions found in Web Development

Filter results
Search results
  • History Heatmap

    History Heatmap

    Visualize your browsing activity as a GitHub-style heatmap calendar. Click any day to see the sites you visited.

    Kaalas Daria

  • Console Error Viewer

    Console Error Viewer

    Capture and display all JavaScript errors, unhandled promise rejections, and console.error/warn calls in real time.

    MumbaiEnjoyer

  • Note to Self

    Note to Self

    Write quick notes tied to the current domain with timestamps. View all notes, export as Markdown, or import/export JSON.

    Vincent

  • NeverUseIPv6

    NeverUseIPv6

    No more IPv6 network requests.

    tajui

  • Table Changer

    Table Changer

    Changes content in (P)lay(S)tation

    lol

    1 user

  • UniBlitz

    UniBlitz

    Blitz Through Evaluations. Unlock Your Results, Because You’ve Got Better Things Than Rating Professors.

    Muhammad Zaid

    1 user

  • Webext Store Helper

    Webext Store Helper

    Small style changes to help with uploading and managing webext

    Jeurissen Apps

    1 user

  • LockForge – Passwort-Generator

    LockForge – Passwort-Generator

    Sicherer Passwort-Generator mit optionalen Features.

    LockForge

    1 user

  • Scroll Speedo

    Scroll Speedo

    Control webpage scroll speed

    Exodus

    1 user

  • X Blue Badge Blocker

    X Blue Badge Blocker

    スレ主を緑枠で保護し、それ以外の青バッジをブロックします（大文字小文字対応・安全装置付き）

    ッッ

    1 user

  • Leak Detector

    Leak Detector

    An add-on that detects and warns you against personal data exfiltration

    .Lab

    1 user

  • IPTrace

    IPTrace

    Instantly reveals your public IP, ISP, ASN, timezone, country and real GPS location. Built with a cybersecurity UI for developers, network engineers and security enthusiasts.

    V Swathi

    1 user

  • NEXUS — All-in-One Browser Suite

    NEXUS — All-in-One Browser Suite

    Tab manager, privacy shield, reader mode, notes, focus timer, password vault, screenshot, and developer tools — all in one extension.

    Vortex

    1 user

  • JWT Viewer

    JWT Viewer

    Analyze JWT tokens offline: decode header and payload, check expiry time, and copy field values.

    Johan

  • Ping Pong Game - By Mr.Bear

    Ping Pong Game - By Mr.Bear

    Classic Pong with a bear twist! Play against the AI!

    Mr.Bear

    1 user

  • freheSwipe

    freheSwipe

    Single‑finger swipe gestures for Back, Forward, and Reload — smooth touchscreen navigation for laptops, tablets, and 2‑in‑1 devices.

    freheCode

    1 user

  • Number Base Converter

    Number Base Converter

    Convert numbers between binary, octal, decimal, and hexadecimal. Shows ASCII/Unicode character for single values.

    Zion

  • One Stop

    One Stop

    One Stop Is Extension Used For Managing All Your Social Media Links.

    Jatin Tekam

    1 user

  • How Old Is This Tab?

    How Old Is This Tab?

    Shows how long the current tab has been open.

    Franklin

  • Anchor Link Extractor

    Anchor Link Extractor

    Lists all anchor links on the current page for quick in-page navigation. Click to jump, copy, or open.

    Petro

  • Instagram Unfollower tollsss

    Instagram Unfollower tollsss

    Instagram takip yönetimi aracı. Sorumlu kullanın.

    Murat Karademir

    1 user

  • Cafenet Nerkh

    Cafenet Nerkh

    کافی نت اکبری هستم: 09050775012 - 09389474877 ابزاری برای مدیریت مشتریان و ردیابی فعالیت‌های روزانه در کافی‌نت. شمارش کلیک‌ها، ورودی‌ها، تایپ، آپلود و زمان هر سایت به تفکیک مشتری و ارائه‌ی فاکتور نهایی به‌صورت خودکار.

    کافی نت آوش اکبری

    1 user

  • URL Breadcrumbs

    URL Breadcrumbs

    Visualise any URL as clickable breadcrumbs. Navigate to any path segment instantly. Shows query params and hash.

    S37169150

  • Image Dimension Display

    Image Dimension Display

    Hover over any image to see its natural and displayed dimensions, format, and file size. Toggle on/off via the toolbar button.

    Millanida

  • gCatcher

    gCatcher

    An extension that checks URL's in new tabs for Graphviz/DOT contents and injects them in the existing one

    Leek

    1 user