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

Log in

13,321 extensions found in Web Development

Filter results
Search results
  • HTTP Indicator

    HTTP Indicator

    Indicator for HTTP/2, QUIC and HTTP/3

    pd4d10

    195 users

  • CoreTax PDF Downloader

    CoreTax PDF Downloader

    Quickly download multiple PDFs from CoreTax portal using official API. No page reload required.

    Mabaega

    195 users

  • APIsec BOLT

    APIsec BOLT

    Discover APIs from browser traffic and auto-generate OpenAPI specs.

    APIsec.ai

    195 users

  • FontFinder

    FontFinder

    A powerful font finder and identifier that recognises fonts on any webpage, displays detailed typography info, and allows on-the-fly modifications.

    Software Best Decisions

    194 users

  • Palette Creator

    Palette Creator

    Creates a color palette from any image. Just right-click on the image and select the 'Palette Creator' option.

    Daniel Perez Alvarez

    193 users

  • WhatsApp Message Scheduler

    WhatsApp Message Scheduler

    Schedule messages in WhatsApp Web. Create messages to send later, set delivery time or delay, and manage all pending scheduled messages in a simple interface. Works directly inside WhatsApp Web.

    Pau

    192 users

  • The Hell is Connections Roblox

    The Hell is Connections Roblox

    Replaces 'Connections' with 'Friends' on any Roblox page

    thebonkeybruh

    192 users

  • WaybackURL

    WaybackURL

    Fetch all the URLs that the Wayback Machine knows about for a domain

    Hossein Shourabi

    191 users

  • Color Picker

    Color Picker

    Pick up amazing color on one click

    Lokdien

    189 users

  • Inspector

    Inspector

    FOSS extension to read and inspect all cookies and local storage.

    MLOP

    189 users

  • OpenAPI DevTools

    OpenAPI DevTools

    Instantly generate API specifications in real time for any app or website. Open the add-on in Firefox developer tools and watch network requests become an OpenAPI specification.

    Andrew Walsh

    189 users

  • Twitter Video Downloader MP3 MP4

    Twitter Video Downloader MP3 MP4

    New Firefox Extension Twitter Video Downloader MP3 MP4 let you easy download any content from Twitter in few steps. Get any Video from Twitter and Download it in MP3, MP4, M4A and other best quality formats. Download video from Twitter TT with FF.

    Youzik YouTube MP3 Converter

    188 users

  • Google-Youtube Search Fixer

    Google-Youtube Search Fixer

    Override the user-agent string presented to Google Search pages to receive the search experience shown to Chrome.

    csalaki

    186 users

  • WebStatSearch

    WebStatSearch

    Get instant domain details for any website.

    WebStatSearch

    186 users

  • Eval Villain

    Eval Villain

    Hook native JavaScript functions before page load to see how a website uses them. Narrow down output based on the appearance of URL and session artifacts, user configured strings/regex, blacklists and more.

    bemodtwz

    185 users

  • Easy DNS lookup

    Easy DNS lookup

    Utility to do DNS lookups directly to DNS APIs and display the response in the addon.

    wesinator

    185 users

  • Show-HTTP-Headers

    Show-HTTP-Headers

    Show HTTP headers in each tab.

    Warren Bank

    185 users

  • WordPress Theme Detection - ThemeDetect.com

    WordPress Theme Detection - ThemeDetect.com

    Find out which theme a WordPress site is using with the help of ThemeDetect.com

    Who Hosts This

    184 users

  • Skip Ads

    Skip Ads

    Skip all annoying ads

    I Am Your Fear

    184 users

  • Disable WebP Images

    Disable WebP Images

    Disables WebP images by removing image/webp from Accept header

    John Galt

    184 users

  • Draw.io MCP Extension

    Draw.io MCP Extension

    Draw.io MCP Extension providing services to Draw.io MCP Server

    Ladislav

    183 users

  • Discord Token Manager — ForwardMsg

    Discord Token Manager — ForwardMsg

    Extract and manage your Discord authorization token. By ForwardMsg.

    ForwardMsg

    183 users

  • NetSuite Toolbox

    NetSuite Toolbox

    Several tools to work better with netsuite. For more informations: https://github.com/vinikira/netsuite-toolbox/blob/master/README.md

    Vinícius Simões

    183 users

  • GitHub Wiki Search

    GitHub Wiki Search

    Simple search box for GitHub wikis.

    Tanner Hodges

    182 users

  • Alexa RANK

    Alexa RANK

    Alexa Traffic Rank is Alexa Internet's free extension for Mozilla. Alexa Traffic Rank accompanies you as you surf, providing you with Alexa.com data about the sites you visit without interrupting your browsing.

    thoduongluat.com

    182 users