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

Log in

13,716 extensions found in Web Development

Filter results
Search results
  • NetSuite Toolbox

    NetSuite Toolbox

    Several tools to work better with netsuite. For more informations: https://github.com/vinikira/netsuite-toolbox/blob/master/README.md

    Vinícius Simões

    185 users

  • WordPress Theme Detection - ThemeDetect.com

    WordPress Theme Detection - ThemeDetect.com

    Find out which theme a WordPress site is using with the help of ThemeDetect.com

    Who Hosts This

    184 users

  • File System Access

    File System Access

    The File System Access API allows web apps to interact with files on the local device.

    sycxyc

    184 users

  • MozBar

    MozBar

    MozBar: The All-In-One SEO Toolbar Analyze SEO metrics, audit on-page elements, and track Domain Authority in real-time.

    Moz

    184 users

  • Histogram Viewer

    Histogram Viewer

    Generates the histogram of a selected image.

    David Fichtmueller

    183 users

  • KOSHIAN メール欄を表示

    KOSHIAN メール欄を表示

    メール欄を表示します

    Pachira

    183 users

  • GitHub Wiki Search

    GitHub Wiki Search

    Simple search box for GitHub wikis.

    Tanner Hodges

    182 users

  • xStyle

    xStyle

    Restyle the web with xStyle, a user styles manager. With xStyle you can install themes & skins for many sites and create your own.

    泷涯

    182 users

  • PubPeer Cookie Injector

    PubPeer Cookie Injector

    更新PubPeer的cookie

    xf

    180 users

  • Draw.io MCP Extension

    Draw.io MCP Extension

    Draw.io MCP Extension providing services to Draw.io MCP Server

    Ladislav

    180 users

  • The Hell is Connections Roblox

    The Hell is Connections Roblox

    Replaces 'Connections' with 'Friends' on any Roblox page

    thebonkeybruh

    180 users

  • Postwoman-ufo Browser Extension

    Postwoman-ufo Browser Extension

    为使用Postwoman UFO Web应用程序提供更好的体验，顺畅的在 postwoman.com.cn 和 postdata.cn WEB应用下访问localhost应用内WEB API，请访问 (https://postwoman.com.cn)

    chenqingzi

    180 users

  • GrowthBook DevTools

    GrowthBook DevTools

    GrowthBook DevTools helps you debug feature flags and experiments and design A/B tests visually — all from your browser.

    GrowthBook

    180 users

  • EcoIndex.fr

    EcoIndex.fr

    Récupérer facilement les analyses Ecoindex faites sur une page grace au moteur ecoindex.fr

    Vincent Vatelot

    180 users

  • Google-Youtube Search Fixer

    Google-Youtube Search Fixer

    Override the user-agent string presented to Google Search pages to receive the search experience shown to Chrome.

    csalaki

    179 users

  • Browserling - Cross-browser testing

    Browserling - Cross-browser testing

    Cross-browser test websites in the most popular browsers such as Internet Explorer, Edge, Chrome, Firefox, Safari and Opera. Try for free!

    Browserling

    179 users

  • Mail Tracker Pro

    Mail Tracker Pro

    Advanced email tracking extension for Gmail. Track when your emails are opened and get real-time notifications.

    Himanshu Sharma

    179 users

  • URL Params Editor

    URL Params Editor

    This is a tool for web developers. It makes editing URL parameters for long URLs much easier. You can use this tool to view each URL param, add new or delete existing ones.

    Z. W.

    178 users

  • Regex Search & Replace

    Regex Search & Replace

    Regex: T ultimate Regex search ⭐️ Simply use Regex on any page with familiar Ctrl+F visuals. ✓ Ctrl+Shift+F search field ✓ Regex query searching ✓ Permanently marking up or replacing anything. ✓ Open Source

    code-for-charity

    178 users

  • SuperDog Authentication Extension

    SuperDog Authentication Extension

    Send a message to a native application for authentication.

    SuperDog Team

    178 users

  • Auto Scroll

    Auto Scroll

    Automatically scroll pages at custom speed.

    Auto Scroll

    177 users

  • Show YouTube Dislikes and Unlisted Videos

    Show YouTube Dislikes and Unlisted Videos

    Miss the ability to see dislikes? Want to have a quicker method of seeing unlisted videos or discover new ones? Now you can have all those things for free!

    stressedyoda

    177 users

  • NousSave: AI Chat Exporter

    NousSave: AI Chat Exporter

    One-click export ChatGPT, Gemini, DeepSeek, Claude conversations to Word, PDF, Markdown, HTML, JSON, CSV. Save AI chats locally!

    noussave

    177 users

  • Inspector

    Inspector

    FOSS extension to read and inspect all cookies and local storage.

    MLOP

    176 users

  • MDN Search

    MDN Search

    To use, type 'mdn' plus your search term into the url bar. Works for JavaScript and CSS reference articles.

    Bryan Clark

    176 users