To use these add-ons, you'll need to download Firefox.

Log in

12,140 extensions found in Web Development

Filter results
Search results
  • HackBar

    HackBar

    A HackBar for google chrome/firefox browser. Small tool for pentesting websercurity.

    Luckywin

    1 user

  • Fullscreen for Chess.com

    Fullscreen for Chess.com

    With this extension installed, press Shift + F to enter fullscreen mode on Chess.com

    Sol

  • PDF Page Counter

    PDF Page Counter

    PDF Page Counter is a Firefox extension that quickly counts the total number of pages in a PDF file without requiring downloads or external software. It provides an efficient way to check page numbers directly within the browser

    Muhammad Zahid

    1 user

  • Infinite Scroll Booster

    Infinite Scroll Booster

    Enhances infinite scrolling for seamless content browsing.

    Minahan

    1 user

  • File Diff Tools

    File Diff Tools

    View and search 118 essential file difference utilities: diff, diff3, sdiff, wdiff, patch, diffstat, and related tools. • Safe offline sidebar reference for Firefox desktop. No tracking. No data collection. No permissions required.

    Libor Benes (Dr. B)

    1 user

  • QR Portal

    QR Portal

    Right-click on any image containing a QR Code to decode and view its content, or hold Ctrl to open the URL directly.

    Andrea F.

  • Snoozz - Snooze Tabs Homelab version

    Snoozz - Snooze Tabs Homelab version

    Snooze tabs and windows until you need them. Homelab fork of Snoozz with CouchDB sync to your own server — no telemetry, no third-party data collection, no analytics. Works fully offline; sync is optional.

    Matheus Faustino

  • New Tab Dashboard

    New Tab Dashboard

    Turn your new tab page into a productivity hub.

    TedRoss

    1 user

  • Sahel - Mehdi

    Sahel - Mehdi

    Copy and Paste custoCopy and Paste customer info between two Shatel forms mer info between two Shatel forms

    Mehdi

    1 user

  • Browser Purge Pro

    Browser Purge Pro

    Completely clear history, passwords, downloads, and serviceWorkers.

    Hartman

    1 user

  • Ligue des fusées

    Ligue des fusées

    Parce que Ligue des fusées est quand même mieux que Rocket League

    Firefox user 13133888

    1 user

  • CBOR viewer

    CBOR viewer

    Decode CBOR to JSON, making it render using the browser JSON engine.

    Thibault

    1 user

  • API Tester Sidebar

    API Tester Sidebar

    Send API requests and view responses from a sidebar.

    DEBET - Nen tang cuoc the thao hien dai

    1 user

  • Env Grabber

    Env Grabber

    Env Grabber is an extension that instantly captures and formats your browser environment details.

    Exolnet

    1 user

  • Multi-time converter

    Multi-time converter

    Instantly convert time between different timezones with intelligent time string detection, with two clicks.

    Will of the Fox

    1 user

  • ColorPicker

    ColorPicker

    Simple color picker tool. Pick colors, convert between HEX/RGB/HSL, and save your palette.

    verathi

    1 user

  • QuickSnip Sidebar

    QuickSnip Sidebar

    Instant search results from QuickSnip into your browser sidebar

    Chandra Kant

    1 user

  • Color Wheel Tool

    Color Wheel Tool

    Explore color harmonies, pick colors from any page, and export palettes for Tailwind, Figma, and CSS.

    Paint Color Consultants

    1 user

  • CookiePal: GCM Debugger

    CookiePal: GCM Debugger

    Diagnose Google Consent Mode issues on any site. Free, no account. Works with any consent banner.

    Cookiepal

    1 user

  • IFrame Changer

    IFrame Changer

    Simple website replacement through IFrame. Specify the source site and the URL to display in the address bar.

    giahoki

  • FlowState - Pomodoro Timer & Todo List

    FlowState - Pomodoro Timer & Todo List

    A tactile, sensory-focused Pomodoro & Todo browser extension that grounds digital work in analog warmth.

    Jaskirat Anand

  • Header Injector

    Header Injector

    Add custom headers to requests matching user-defined URL patterns.

    Russi

    1 user

  • Request Replay Studio

    Request Replay Studio

    Capture HTTP/HTTPS requests in real-time. Modify headers, methods (GET, POST, PUT, DELETE), and payload bodies (JSON, XML, Form Data) before re-sending.

    ItsBryanC

    1 user

  • LoadFocus: Page Speed Monitor

    LoadFocus: Page Speed Monitor

    Website Speed Test and Page Speed Monitoring extension for web pages - LoadFocus.

    NOHU90

    1 user

  • Website info extractor

    Website info extractor

    Extract info from websites

    Noonviewer

    1 user