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

Log in

8,829 extensions found in Web Development

Filter results
Search results
  • My IP

    My IP

    This extension will give you information about your current IP address.

    Tatami-web

    63 users

  • srcrplc - Unblock Imgur Images

    srcrplc - Unblock Imgur Images

    This add-on allows to see blocked Imgur images in pages via proxy.

    Atakan Au

    63 users

  • Motivate Clock | Time Tracker

    Motivate Clock | Time Tracker

    Motivate Clock is incredibly simple and absolutely free time tracking assistant for anyone whose work involves working with computers.

    Valerii Bashtovoi

    63 users

  • HTML Tag Error Checker

    HTML Tag Error Checker

    Check the HTML start and end tags for problems.

    macha

    63 users

  • Snipit - organize, share, collaborate

    Snipit - organize, share, collaborate

    Powerful code snippets manager for dev teams and individuals. Save and organize your code snippets in the cloud. Share and collaborate with your team members. Snip code blocks directly from the pages you visit.

    Andrei Duca

    62 users

  • Usersnap

    Usersnap

    Send feedback and report bugs on any website with screenshots and annotations. Metadata (URL, screen size, browser version...) automatically attached. All directly in the browser. Install and collect feedback with Usersnap for free.

    Usersnap

    62 users

  • Edit Anything any website

    Edit Anything any website

    Simple extension that allows you to edit text on any website. Twitter, Facebook, Instagram and popular news website.

    yaagame

    62 users

  • Best Cookie Editor

    Best Cookie Editor

    View, modify or delete browser cookies. Absolutely open-source.

    Sumalya Chatterjee

    62 users

  • Free OmniGraffle (.graffle) Viewer

    Free OmniGraffle (.graffle) Viewer

    Open your OmniGraffle files for free

    Lucidchart

    62 users

  • WP Detective

    WP Detective

    Find out what theme and plugins the WordPress sites you visit are using.

    Firefox user 12870765

    62 users

  • AWS Favicons

    AWS Favicons

    Favicons for all AWS services

    Maddison Hellstrom

    62 users

  • BarnumPT

    BarnumPT

    Step right up to BarnumPT—your ultimate digital marketing ringmaster! Perfect for ClickFunnels users and savvy marketers.

    Prime Mover

    62 users

  • Password Generator ⚡ PRO

    Password Generator ⚡ PRO

    Powerful and user-friendly extension/add-on with PRO features for randomly generating and checking passwords security.

    Qit.tools

    62 users

  • ping

    ping

    Just a toolbar button that shows if a server is up or not.

    Simon

    62 users

  • Paste as Markdown

    Paste as Markdown

    Paste as Markdown, from anywhere, into any web form.

    Medusis

    62 users

  • URL Throttler

    URL Throttler

    This simple and straightforward add-on allows you to delay network responses from a custom list of URLs for a specified amount of time.

    Joseph Coyle

    62 users

  • AWS Peacock Management Console

    AWS Peacock Management Console

    You can flexibly set the header and footer colors of the AWS Management Console based on Account ID, Role name, Permission Set, and Region.

    hiroga

    61 users

  • Asuka.IO Whois - ドメイン名調査ツール

    Asuka.IO Whois - ドメイン名調査ツール

    この拡張機能を使用すると, ドメイン名情報を簡単に表示できます. アドオンボタンをクリックまたはコンテキストメニューから選択すると, 現在参照しているサイトのドメイン名登録情報を表示することができます.

    Asuka.Net

    61 users

  • Facebook Unfollowers

    Facebook Unfollowers

    Fastest way to Unfollow All Of Your Friends Pages & Groups At once!

    Fekerine

    61 users

  • BlazeMeter

    BlazeMeter

    Record Selenium and HTTP traffic to create a load and functional tests in less than 10 minutes (Apache JMeter Compatible).

    58WIN

    61 users

  • Measure-it

    Measure-it

    Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.

    Firefox user 14137346

    61 users

  • TeraBox Coin Collector

    TeraBox Coin Collector

    Collect coins from TeraBox and get unlimited free cloud storage and premium on TeraBox

    Lomusire

    61 users

  • Editer

    Editer

    Instantly Edit Web Pages in your browser with a single click to instantly edit text and layout elements directly in the browser. Ideal for quick content testing, web design, debugging, meme making, and more!

    Vijay Samant

    61 users

  • Get That API

    Get That API

    Get That API is an open-source browser extension made to test API endpoints right in the browser

    Ashutosh Dash

    61 users

  • Validate HTML

    Validate HTML

    Submits the HTML of the current tab to the W3C Validator. Source submitted is from a GET request not the DOM. Written out of the need to easily validate protected directories. Not advisable for use on pages with sensitive information.

    Nathan Hernden

    61 users