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

Log in

11,489 extensions found in Web Development

Filter results
Search results
  • YouTube Thumbnail Downloader

    YouTube Thumbnail Downloader

    Adds a clean hover button on YouTube thumbnails to view, download, or copy the full-resolution image (maxresdefault.jpg). Works on channel pages, search, and video pages.

    Ryan Aby

    11 users

  • On-Screen Keyboard

    On-Screen Keyboard

    On-Screen Keyboard for FireFox

    Willem

    11 users

  • #TS Discord Token Login

    #TS Discord Token Login

    Firefox add-on that allows you to quickly log in with Discord token

    TrablusTeala

    11 users

  • Prodwarn - Production Warning

    Prodwarn - Production Warning

    Warning when you are in the production site

    Kim Nguyen

    11 users

  • sslspeedy

    sslspeedy

    secure and speed up your web connections. default to proxy

    vpnso

    11 users

  • GMaps Copy Coordinates

    GMaps Copy Coordinates

    Copy coordinates appear after clicking "What's here?" on G Maps

    Erick Madrigal

    11 users

  • phabrinter

    phabrinter

    Make Phabricator usability more similar to Splinter.

    arai_a

    11 users

  • ConEx: Web Content Extractor

    ConEx: Web Content Extractor

    ConEx is a web content extractor that extracts the main content from a webpage.

    Josep Silva

    11 users

  • amo-info

    amo-info

    The best extension to show information about AMO and related services.

    William Durand 🌟

    11 users

  • LichessMouseBlock

    LichessMouseBlock

    Block the annoying scrolling of moves on lichess if you are a Magic Mouse user.

    Sene810

    11 users

  • Keycloak bearer token getter

    Keycloak bearer token getter

    Get the authentication bearer token from a configurable Keycloak instance

    legarsjules

    11 users

  • Logis Sign - Firma Electrónica

    Logis Sign - Firma Electrónica

    Logis Sign es una extensión de navegador que permite firmar documentos PDF electrónicamente con tokens USB (ePass3003Auto, SafeNet, etc.) directamente desde la plataforma ZFP-LogisPort.

    Edgar

    11 users

  • Conversor de Texto

    Conversor de Texto

    Converte textos para maiúsculo, minúsculo e conta o número de palavras. #addonshackday #MozActivate17

    Luis Fernando Mangia

    11 users

  • Manifest Viewer (DASH/HLS)

    Manifest Viewer (DASH/HLS)

    Viewer for DASH (.mpd) and HLS (.m3u8) manifests with syntax highlighting.

    Bal Solutions

    11 users

  • CloudKeeper Tuner

    CloudKeeper Tuner

    Optimise AWS cost effortlessly using Cloudkeeper Tuner Extension in AWS console itself.

    CloudKeeper

    11 users

  • Drupal Forge helper extension

    Drupal Forge helper extension

    This extension sets up a development environment for Drupal contributions.

    Darren Oh

    11 users

  • Watani Refund Tool

    Watani Refund Tool

    Auto fill Watani support ticket (RefundWatani Ticket Auto Fill is a Firefox extension that helps users quickly create refund support tickets on the Watani platform by automatically filling required fields and a predefined message template. The add-o)

    Mosa

    11 users

  • Node.js Highlighter

    Node.js Highlighter

    Highlights instances of 'Node.js' on the current website

    79king

    11 users

  • MDN Search 2026: Web & Extension Developers' Bible

    MDN Search 2026: Web & Extension Developers' Bible

    Set MDN as your default engine for instant access to 11,000+ verified web docs. Use AI Help for real-time coding solutions and technical preservation through 2026. The world’s most trusted library for HTML, CSS, and JS—search like a pro today!

    Handmade Internet Treasures

    11 users

  • yt-dlp-button

    yt-dlp-button

    The button that generates yt-dlp command.

    EZelenov

    11 users

  • CORS Unlocker

    CORS Unlocker

    Enable cross-origin requests without proxy servers. Eliminate infrastructure costs for developers calling third-party APIs. One-click CORS activation with smart rule management.

    Saiya

    11 users

  • DuinoCoin Wallet

    DuinoCoin Wallet

    DuinoCoin Wallet extension

    MyEcoria

    11 users

  • Syncfy

    Syncfy

    Syncfy extension used to complement connections

    Luis Saúl González Guerra

    11 users

  • UUID Generator

    UUID Generator

    A simple and fast UUID generator. Quality of life features built in.

    HelpfulFish

    10 users

  • Extrator de Números

    Extrator de Números

    Com um simples clique, a extensão busca por números de telefone em texto visível e os organiza em uma lista única.

    afCode

    10 users