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

Log in

11,565 extensions found in Web Development

Filter results
Search results
  • 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

  • Proxy-Fu

    Proxy-Fu

    Dynamic HTTP/SOCKS proxy addon that tries not to suck. Routes traffic through proxies based on hostnames.

    John Vegas

    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

  • LeetCode Canvas

    LeetCode Canvas

    Add a drawing canvas to LeetCode problem pages

    Satvik Rajput

    1 user

  • New Repl

    New Repl

    Quickly create a new repl on repl.it! (Not associated with repl.it)

    Gav Hern

    1 user

  • Ducky MDN

    Ducky MDN

    This extension helps developers find references quickly using mozilla developer network. Just type in "mdn some term".

    Andrei Petcu

    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

  • CookiePal: GCM Debugger

    CookiePal: GCM Debugger

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

    Cookiepal

  • Quick Glance

    Quick Glance

    "Quick Glance" is a powerful extension using advanced AI to summarize any webpage swiftly. Offering essential insights within seconds, it adjusts to window size for convenience. No OpenAI account or API keys needed. Customizable prompts available.

    Soheil Yasrebi

    1 user

  • Floating Notepad

    Floating Notepad

    A pop-up notepad that stays on top of your browser.

    Cassius Moore

    1 user

  • Hide/Show Page Element

    Hide/Show Page Element

    Addon để ẩn hoặc hiển thị một phần tử trên trang web.

    ok9decom

    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

  • Mz Mz Sneaky

    Mz Mz Sneaky

    Hides elements in webpages using CSS selectors.

    Muuuz

    1 user

  • SimpleNav

    SimpleNav

    Remove unwanted DOM elements from specific websites using custom CSS selectors

    Sebastian Wilson

    1 user

  • copy-jwt

    copy-jwt

    Find and copy JWT tokens from localStorage, including encrypted MSAL (Microsoft Authentication Library) v5 tokens

    bianucci

    1 user

  • YouTube Layout Customizer

    YouTube Layout Customizer

    Custom YouTube layout extension that lets you adjust video grid size, spacing, title appearance, and hide Shorts or live content for a cleaner browsing experience.

    Anwar

    1 user

  • Full Screenshot to Clipboard

    Full Screenshot to Clipboard

    Capture a full-page screenshot of the current tab and copy it to the clipboard.

    Senna Automation

    1 user

  • Safetyper

    Safetyper

    A Grammarly alternative, where you own what you type on your keyboard.

    Andras Bacsai

    1 user

  • Tick Them ALL

    Tick Them ALL

    Sekali klik kamu bisa pilih semua sekaligus - Hubungi saya untuk pengembangan @tunggalista

    Tunggal Ika Saputra

    1 user

  • UrlRegexBar

    UrlRegexBar

    Displays an identification color bar at the top of the page based on URL patterns (supports regular expressions).

    whaletech

  • Vimeo Video Clipper

    Vimeo Video Clipper

    Create custom clip links from Vimeo videos.

    vimeo-video-clipper

    1 user

  • Privatisator

    Privatisator

    Adds a keyboard shortcut (Ctrl+Shift+F, can be changed) to open currently shown page in a private tab.

    Felix Wolfsteller

    1 user

  • Env Grabber

    Env Grabber

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

    Exolnet

    1 user

  • QRCGen — QR Code Generator

    QRCGen — QR Code Generator

    Generate QR codes, copy share links, and embed snippets. Side panel workflow, offline preview, canonical SVG URLs.

    301.st

    1 user

  • CSS Selector Capture

    CSS Selector Capture

    Real-time CSS selector generation tool with parent/child and sibling strategies

    dev47

    1 user