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12,613 extensions found in Web Development

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  • JavaScript Playground ⚡ Online JS Compiler

    JavaScript Playground ⚡ Online JS Compiler

    **Write and run JavaScript code instantly.** Skip the setup and open a distraction-free playground with a single click. Test functions, debug concepts, or learn new features right in a dedicated popup. just pure, instant JS code execution.

    onyxwizard

    29 users

  • Code Formatter

    Code Formatter

    Beautify code instantly in Firefox. No more minified CSS, compressed JSON, or unreadable source code—this extension automatically detects and formats it all with syntax highlighting.

    sparkle_64

    29 users

  • Download Serialized DOM

    Download Serialized DOM

    Download serialized DOM with a click, which should include changes within the page effected since loading e.g. by JavaScript.

    srguiwiz

    29 users

  • No Pause Playback Free

    No Pause Playback Free

    Prevents websites from pausing audio/video when you switch tabs and blocks unwanted popup tabs. Enable per site with one click.Prevents websites from pausing audio/video when you switch tabs and blocks unwanted popup tabs. Enable per site with one cl

    Builder Wrench

    29 users

  • Ticketmaster checkout

    Ticketmaster checkout

    Automatically refreshes until the tickets are available to buy and tries to checkout. When the event has a Find Tickets button the addon will click the button for you, the defaulted selected seats is 2.

    Peter

    28 users

  • security.txt

    security.txt

    Displays the security.txt and humans.txt files for a website if available.

    harmless.systems

    28 users

  • Vue Devtools Unlocker

    Vue Devtools Unlocker

    Enable Vue DevTools in production environments

    zhensherlock

    28 users

  • Bypass Telegram Web

    Bypass Telegram Web

    Emulate Mobile on the Web version of Telegram to run Mini-Apps and Get full Data.

    David Rockefeller

    28 users

  • Display Window Size

    Display Window Size

    "Display Window Size" is a handy Firefox addon that allows users to view the current window size of their browser. With this addon, users can easily see the dimensions of their browser window and adjust elements on webpages more accurately.

    123B

    28 users

  • Audio Editor

    Audio Editor

    You can edit audio for free

    Firefox addon Free

    28 users

  • JS Beautifier settings tweaks

    JS Beautifier settings tweaks

    Changes jsbeautifier.org to have 4 spaces, no wrap, and be JSLint-happy by default.

    Ryan P. C. McQuen

    28 users

  • GitHub Pages 404

    GitHub Pages 404

    Provides links to Owner's Profile and GitHub Repo on a GitHub Pages 404 page.

    Harsh Narayan Jha

    28 users

  • OpenConnect for Ivanti Connect Secure

    OpenConnect for Ivanti Connect Secure

    Makes connecting to the VPN with OpenConnect easier

    Earl Franklin

    28 users

  • Format with Prettier

    Format with Prettier

    Use prettier from your browser!

    Lenz Weber-Tronic

    28 users

  • Evernote Idea Saver

    Evernote Idea Saver

    A Mozilla extension to save ideas directly to Evernote.

    Javier Gordon

    28 users

  • ChatGPT → Markdown (Side Panel)

    ChatGPT → Markdown (Side Panel)

    Esporta conversazioni ChatExport ChatGPT conversations to Markdown with one click. Instantly copy from a clean in-page side panel. No tracking, no external cGPT in Markdown con un clic. Visualizza e copia il contenuto da una tendina laterale in-page.

    Luigi S

    28 users

  • Flexo - Flexbox helper

    Flexo - Flexbox helper

    A browser extension for testing CSS flexbox rules.

    Mijo Kristo

    28 users

  • Tabbard

    Tabbard

    Copy all tab URLs to clipboard

    George Chakhidze

    28 users

  • Packmind for Code Review

    Packmind for Code Review

    Skyrocket your code review experience with all Packmind capabilities.

    Packmind

    28 users

  • LocatorLens – Smart Locator Automation

    LocatorLens – Smart Locator Automation

    Inspect any element and instantly get ranked, copy-ready Playwright, Selenium, and Cypress locators. Built for QA engineers who want stable, maintainable test automation selectors — not brittle XPaths.

    Yogesh

    28 users

  • Fire Page Editing

    Fire Page Editing

    Inject HTML, CSS or JavaScript into any web-page. The changes you make are applied everytime you visit the specified website(s).

    Francesco De Stefano

    28 users

  • Stack Copy Button

    Stack Copy Button

    A copy button for Stack Overflow code boxes

    MrMino

    28 users

  • Superpower Google

    Superpower Google

    Ported version for Firefox of Superpower Google (adapted from Chrome MV3)

    vic-bosse

    28 users

  • Gemini Auto Listen

    Gemini Auto Listen

    Gemini Auto Listen automatically clicks the native "Listen" button when new responses appear, enabling hands-free audio playback.

    Hyan Santos

    28 users

  • Base64 Encoder/Decoder

    Base64 Encoder/Decoder

    Encode/decode base64 strings. Includes both popup GUI and context menu functionality. Allows encoding/decoding by a modified value (x2, x3, x4, etc).

    drewmarsh

    28 users