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

Log in

5,882 extensions found in Web Development

Filter results
Search results
  • React Context DevTool

    React Context DevTool

    React Context DevTool is a debugging tool for React Context and useReducer API.

    Deep Patel

    1,432 users

  • Swagger UI

    Swagger UI

    Swagger-UI for Firefox

    Steven Tappert

    1,420 users

  • Ace Script

    Ace Script

    User Script Manager with the support of Ace Stream technologies

    Ace Stream

    1,414 users

  • Port Authority

    Port Authority

    Blocks websites from using javascript to port scan your computer/network and dynamically blocks all LexisNexis endpoints from running their invasive data collection scripts.

    Hacks and Hops

    1,413 users

  • Copycat

    Copycat

    Copy content from web powerful than ever before.

    BlackGlory

    1,408 users

  • app.telemetry Page Speed Monitor

    app.telemetry Page Speed Monitor

    Get the page load times of any web page! app.telemetry Page Speed Monitor shows offset and duration of each step during the page load based on W3C navigation timing.

    app.telemetry

    1,396 users

  • Ember Inspector

    Ember Inspector

    Tool for debugging Ember applications.

    Ember.js

    1,396 users

  • Multiple Search and Highlight

    Multiple Search and Highlight

    Highlight multiple words separated by comma, space or arbitrary separator with regular expression support

    Brian

    1,393 users

  • SEO Site Tools, Site Analysis

    SEO Site Tools, Site Analysis

    One-click SEO extension. Quick access to SEO analysis. Features: website indexed pages, backlinks, Alexa, IP, SEO stats and tools.

    SEO Site Tools

    1,385 users

  • Debug CSS

    Debug CSS

    Adds outline to all elements on the page to show the culprit element which is changing desired layout hit `Alt+Shift+C ` key to toggle the extension

    Pranay Joshi

    1,378 users

  • JWT Debugger

    JWT Debugger

    The JWT.io debugger as a Web Extension

    JWT.io

    1,370 users

  • Spector.js

    Spector.js

    Easily explore and debug any WebGL context.

    BabylonJS

    1,365 users

  • View Page Source (Mobile)

    View Page Source (Mobile)

    Adds the ability to open the page source in a new tab via button (Desktop) or menu (Firefox for Android).

    David Pacassi Torrico

    1,362 users

  • Dynamics 365 Power Pane

    Dynamics 365 Power Pane

    The CRM Power Pane is a helper tool designed to integrate with Microsoft Dynamics CRM application and allow you to manipulate forms.

    Onur Menal

    1,344 users

  • Tab2QR

    Tab2QR

    A minimalist browser extension that generates QR codes from your current tab, allows you to edit the encoded content, copy QR code image to clipboard, or download as PNG or SVG files.

    James Shih

    1,341 users

  • Free OpenVPN Server Finder

    Free OpenVPN Server Finder

    Display up-to-date list of public OpenVPN servers provided by VPN Gate (University of Tsukuba)

    Andy Portmen

    1,341 users

  • OpenLorem

    OpenLorem

    Lorem Ipsum filler text for web developers. Uses Loripsum, Bacon Ipsum and Dino Ipsum APIs to retrieve customized text. Insert into fields using context menu. Source code is available on Github.

    BojanK

    1,333 users

  • LiveHosts

    LiveHosts

    Switch your host/IP mappings in real time without editing your hosts file

    Aioros

    1,332 users

  • SAML Message Decoder

    SAML Message Decoder

    This tool helps you debug your SAML based SSO/SLO implementations. It runs in the background, collecting SAML messages as they are sent and received by the browser.

    Magnus Suther

    1,332 users

  • DataScraper

    DataScraper

    Extension for FF and Chrome to extract data from web pages to csv.

    Rakot

    1,320 users

  • wxIF

    wxIF

    View the EXIF/IPTC/XMP metadata for images. WebExtensions port of the FxIF add-on.

    Garf

    1,298 users

  • Infy Scroll - A Next Page AutoPager

    Infy Scroll - A Next Page AutoPager

    Add customized infinite scrolling to websites and auto load the next page. Supports the AutoPagerize and InfyScroll Databases.

    Sixcious

    1,292 users

  • Adblock For Youtube

    Adblock For Youtube

    Adblock For Youtube & Auto Ad Skip It is auto ad skip for youtube, ad blocker, hides ad banner in youtube home screen.

    Patricia Fisher

    1,288 users

  • Display #Anchors

    Display #Anchors

    Displays anchors for all content in the current web page without breaking the layout.

    Rob W

    1,288 users

  • Self-Destructing Cookies (WebEx)

    Self-Destructing Cookies (WebEx)

    Delete cookies when browser is closed or once the tab is closed to prevent possible trackings (similar to Ove's Self-Destructing Cookies which is not compatible with FF57 anymore)

    Joue

    1,285 users