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

Log in

12,089 extensions found in Web Development

Filter results
Search results
  • HeadEdit

    HeadEdit

    Adds a browser toolbar icon that allows setting of global or domain-specific header overrides.

    TrapperHell

    1 user

  • Hyperapp Debug Dev Tools

    Hyperapp Debug Dev Tools

    Time-travel debugger for Hyperapp V2

    Alex Barry

    1 user

  • Injetor de Mensagens

    Injetor de Mensagens

    A notepad extension with Supabase auth and copy/paste automation.

    Davi Eduardo

    1 user

  • QR Code Buddy

    QR Code Buddy

    "QR Code Buddy" - your go-to pal for quick and easy QR code generation. Create, customize, download, and even shorten URLs, all with a few clicks. It's QR codes, simplified!

    Cufiy

    1 user

  • Nova

    Nova

    A cute, bluish cat to chill with you on every webpage! A simple, fun personal project bringing a little companion to your browser.

    Hummingbird

    1 user

  • ChatSnap

    ChatSnap

    Export chats from Grok, ChatGPT and Claude to Markdown or TXT files

    ChatSnap

    1 user

  • Ajuste de Texto

    Ajuste de Texto

    Controla el tamaño del texto en cualquier sitio web.

    Hacker598

    1 user

  • core-js count

    core-js count

    how many copies of core-js are on this page?

    easrng

  • Jira time converter

    Jira time converter

    Convert Jira time into an understandable format

    Horodnuk

    1 user

  • AlgoVoi

    AlgoVoi

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

    Chris Hopley

    1 user

  • remove-json-prefix

    remove-json-prefix

    Remove JSon highjacking prefix

    ncoif

    1 user

  • Test_ClFfAddonXPI

    Test_ClFfAddonXPI

    WebAccessLog Engine WebExtensions (FF)

    lsp motex

    1 user

  • GitHub Red Issues

    GitHub Red Issues

    Revert closed GitHub issues from purple back to red.

    Katsute

    1 user

  • Open in new tab with duplicated tab

    Open in new tab with duplicated tab

    Adds a context menu item to open a link in a new duplicated tab. Useful for sites that have session handling that doesn't support the native open in new tab function

    Will Herrin

    1 user

  • eGrab

    eGrab

    Hover-select any element on a webpage, then right-click to copy HTML, CSS, JavaScript references, or all combined. No DevTools required.

    Rayen Bahroun

    1 user

  • Find my ip address

    Find my ip address

    This is an simple extension which is helpful to find your public ip address.

    Sasidharan

    1 user

  • paramAdder

    paramAdder

    Adds a parameter to url. Parameter to be defined in options

    Firefox user 12830111

    1 user

  • Loko — Color Picker

    Loko — Color Picker

    Pick colors from any webpage. Supports HEX, RGBA, and HSL with one-click copy. Includes a full gradient color picker with hue slider and editable inputs.

    Sambatra

    1 user

  • Design Mockup Helper

    Design Mockup Helper

    Easily create and manage design mockups with tips and visual guidance.

    Pdss

    1 user

  • Shortlink Expander

    Shortlink Expander

    Expand shortened links to reveal the full destination.

    Norman Duke

    1 user

  • Orius AI

    Orius AI

    Turn your browser into a compute node and earn Orius tokens on Solana

    Orius

    1 user

  • NoJSLite

    NoJSLite

    Control JavaScript Capability

    Pepper

  • LeetJump - Leetcode quick search extension

    LeetJump - Leetcode quick search extension

    Quick LeetCode problem search with Alt+L - minimal, fast, and clean interface

    lirena00

    1 user

  • Pixiv Info Saver

    Pixiv Info Saver

    Save artist and tags data from Pixiv

    sergey_belovv

    1 user

  • Web Clipper — Save Pages as Markdown

    Web Clipper — Save Pages as Markdown

    Clip any webpage into clean Markdown. Organize by project, export to Notion/Obsidian, and keep your research tidy.

    Ryder5

    1 user