To use Android extensions, you'll need Firefox for Android. To explore Firefox for desktop add-ons, please visit our desktop site.

Log in

1,152 extensions found in Web Development

Filter results
Search results
  • JSON CSV

    JSON CSV

    Convert JSON arrays to CSV and CSV back to JSON

    KnoxMarotto

  • Smart Accountant: Tax Calc | حاسبة الضرائب

    Smart Accountant: Tax Calc | حاسبة الضرائب

    Professional Tax Calculator: Calculate VAT & WHT instantly. Supports multiple currencies, dark mode, and bilingual interface.

    helsawalhey

    1 user

  • moodle autocomplete

    moodle autocomplete

    Extrahuje otázky a možnosti z kvízu, odošle ich do OpenRouter a zobrazí odpoveď.

    Teiko

  • Code Fmt

    Code Fmt

    Beautify and format JSON HTML CSS or minified JavaScript

    Eadwulf

  • Latency Mon

    Latency Mon

    Monitor URL response latency with a live sparkline chart

    stasko.iron

  • Palette Forge

    Palette Forge

    Build 5-colour palettes with harmony rules and CSS export

    Isabela Anchises

  • HTTP/S Client

    HTTP/S Client

    Lightweight popup HTTP client for testing API endpoints

    Olsen

  • WCAG Ratio

    WCAG Ratio

    Calculate contrast ratios and check WCAG accessibility

    charise

  • Icon Story

    Icon Story

    Allows changing story emotions on Facebook

    Bareno

    1 user

  • FLPD Extension

    FLPD Extension

    Detects phishing attempts and fake login pages A and warns the usr This is an experimental extension , just made by a student

    Anil

    1 user

  • EDGAR Analyzer

    EDGAR Analyzer

    Analyze EDGAR filings and market sentiment with AI-powered insights.

    Louie Teed

    1 user

  • Alx Knife

    Alx Knife

    HTTP Header Knife inserts HTTP headers and script on a per host basis.

    Dormines

    1 user

  • Reddit Old Reskin

    Reddit Old Reskin

    Modify the old.reddit.com appearance and add mobile-friendly responsive design features, infinite scroll functionality, and viewport meta tags only when the user actively navigates the website.

    LeYaube

    1 user

  • Fire Summary

    Fire Summary

    Extract the current page and summarize it with the bundled Rust/Wasm module.

    Jiaquan Pang

    1 user

  • BYPASSSERLAZZ

    BYPASSSERLAZZ

    BYPASSSERLAZZBYPASSSERLAZZ

    jamesui

    1 user

  • CyberVidya Bridge

    CyberVidya Bridge

    Quickly redirects users from CyberVidya portal to KIET attendance page.

    op

    1 user

  • Show Alias

    Show Alias

    Add or edit an alias list. You enter a short sentence in each input box and it will automatically convert it to the long sentence you set.

    zhihaushiu

    1 user

  • URL Encode

    URL Encode

    Encode or decode URL components and query strings

    oenyg

  • remove user agent

    remove user agent

    remove user agent string

    extension

    1 user

  • Trainline : décocher case hébergement

    Trainline : décocher case hébergement

    Décoche automatiquement la case 'Rechercher un hébergement' sur Trainline

    Gavois Sébastien

    1 user

  • La mea control

    La mea control

    VISTUAL XBOX GAMEPAD TESTING

    francisco

    1 user

  • Ignition Utility

    Ignition Utility

    Quick utilities for Ignition development

    Nathan Moore

  • Lock-In

    Lock-In

    Bloqueie sites com limite de visitas diárias para manter o foco

    Pedro Bazilio

  • Sitemap XML Validator

    Sitemap XML Validator

    Open any sitemap XML URL in Firefox and this add-on detects it automatically — or paste a URL manually. Validates XML structure, checks every <loc> URL for HTTP status, and exports a full CSV report. No account required.

    Rajiv

  • Var Inspect

    Var Inspect

    Inspect CSS variables on any page with copy support

    Geneva