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

Log in

13,274 extensions found in Web Development

Filter results
Search results
  • Eveluatieon

    Eveluatieon

    Evaluates webpage security using client-side analysis and explains findings in human-readable language.

    Print_JK

  • Unlimited Table Extractor

    Unlimited Table Extractor

    Extract HTML tables from any website. Highlight, right-click to extract, and export to Excel, CSV, JSON, or copy to clipboard.

    NiranjanBuilds

    1 user

  • PageSieve

    PageSieve

    PageSieve is a browser extension that assists with the extraction of structured data from any page you visit. Define names, CSS selectors and (optionally) pagination strategy through a sidebar and extract and export data in a variety of formats.

    Julius K

    1 user

  • Gemini Project Manager Pro

    Gemini Project Manager Pro

    Transform Gemini sidebar into a professional workspace with projects, folders, and quick prompts.

    Msevinc

    1 user

  • Twitch User ID Copier

    Twitch User ID Copier

    Копирует числовой ID пользователя Twitch в буфер обмена одним кликом на странице канала.

    Katrovsky

    1 user

  • NoJSLite

    NoJSLite

    Control JavaScript Capability

    Pepper

    1 user

  • Kremy

    Kremy

    Remember your defaults across websites.

    Kostas

    1 user

  • SC Monitoring

    SC Monitoring

    Adds a browser action that monitors resource usage of all browser processes.

    rDigitalMarketing

    1 user

  • glass-easel DevTools

    glass-easel DevTools

    DevTools extension for developing glass-easel applications

    wechat-miniprogram

    1 user

  • 1Win Game

    1Win Game

    The 1Win Game Add-on offers quick access to download and register on 1Win Game, with a sleek dark blue UI. It includes an intro to the platform and popular games like Poker, eSports, and Sports Betting.

    AJ Qureshi

    1 user

  • Cap Context

    Cap Context

    Carry conversation context between Claude, ChatGPT, Gemini, Grok, and DeepSeek.

    Vinit

    1 user

  • MD/CSV/TSV Viewer

    MD/CSV/TSV Viewer

    Open and preview Markdown, CSV, and TSV files directly in Chrome.

    Thân Oguyn

    1 user

  • My Custom HTTP Headers

    My Custom HTTP Headers

    Uma extensão para que você possa testar seus sites com HTTP headers customizados. Útil para testes A/B, Blue Green ou ainda Canary release.

    Marcos Xavier

  • Nexus — SEO & SERP Intelligence

    Nexus — SEO & SERP Intelligence

    Zero-cost SEO intelligence: keyword classification, AEO/GEO auditing, link analysis, and SERP intelligence — all client-side.

    Dev

    1 user

  • AlgoVoi

    AlgoVoi

    Web3 wallet for Algorand + Voi with native x402 HTTP payment support

    Chris Hopley

    1 user

  • Email-Sniper

    Email-Sniper

    Extract email addresses from any website. Scan single pages or crawl entire websites to find all emails with one click.

    machine1337

    1 user

  • Page Info Viewer

    Page Info Viewer

    View page info, meta tags, schema, links, phone numbers, and SEO data.

    John Kerry

    1 user

  • Dark Mode Master

    Dark Mode Master

    Free dark mode for all websites. Easy on the eyes. One-click toggle to switch any website to a comfortable dark theme.

    Loop Addons

    1 user

  • Japanese Font Finder — Detect Any Web Font

    Japanese Font Finder — Detect Any Web Font

    Identify any font instantly. Hover to detect, click to copy CSS. 150+ Japanese fonts. Highl... | Not affiliated with Anthropic, PBC.

    S-Hub

    1 user

  • OSK Overlay

    OSK Overlay

    Simuleaza overlay-ul tastaturii virtuale pe mobile pentru audit UX

    Andrei R

    1 user

  • Opquast DevTools

    Opquast DevTools

    Run Opquast web quality and accessibility checks right inside the browser DevTools (Chrome + Firefox).

    Opquast

  • PR Sidebar

    PR Sidebar

    Lists your open GitHub pull requests in the Firefox sidebar. Talks only to api.github.com with a read-only token.

    dannash

  • Hookshot - REST API Client & HTTP Request Tester

    Hookshot - REST API Client & HTTP Request Tester

    Test and debug REST APIs, HTTP requests and webhooks. Import cURL commands, save history. Free API testing tool for developers.

    Eric

    1 user

  • SolveSolo: AI Blocker for LeetCode & GFG

    SolveSolo: AI Blocker for LeetCode & GFG

    A focus tool that blocks AI assistance (ChatGPT, Gemini and other LLMs) and distractions while you are solving problems on LeetCode and GeeksforGeeks. It enforces independent problem-solving with a penalty timer for incorrect submissions.

    oipi

    1 user

  • BrowseX: AI Web Automation

    BrowseX: AI Web Automation

    Intelligent web automation powered by AI. Extract data, fill forms, navigate websites, and accomplish tasks automatically.

    Brilworks Software

    1 user