Sample Firefox Extension, Protect passwords, find deals, enhance video, and block annoying ads with browser apps. You’ll find the resources you need, whether Firefox extensions expand the functionality of the browser with new features not available in the default program. css Discover the range of tools for Firefox extension development, including web-ext and boilerplating utilities to streamline your workflow. They can block annoying ads, protect passwords, change browser appearance, and more. mozilla. It is one of the swiftest ways to add the required Firefox Learn how to create a Firefox add-on with step-by-step instructions and best practices. They enjoy simple distribution through browser extension galleries, access to powerful web APIs, and Improve your privacy and add essential features to Firefox with these add-ons. Fear not -- I have created a very basic Firefox extension template A Google Chrome extension is a small software program that extends the functionality of the Chrome browser. A lightweight polyfill library for Promise-based WebExtension APIs in Chrome - mozilla/webextension-polyfill Update: Firefox has used the WebExtensions API as its extension API since 2017. This repository is intended as an example repository containing templates and good practices for creating an add-on for Firefox. Convert any page into a typing speed test. Get guides on Manifest V3, cross-browser porting, security best practices, and debugging tools for your add-ons. Learn more on the Chromium blog). A few examples rely on APIs that are only available in pre-release versions of Firefox. Is Firefox your preferred browser? These are the best Firefox extensions you must start using immediately to elevate your browsing Extensions, or add-ons, can modify and enhance the capability of a browser. Master Extensions can add powerful customization features to Firefox — everything from ad blockers and tab organizers to enhanced privacy features, tools for writers, and more. The tutorial has been constructed as a step-by-step guide For example, entries in the namespace example are accessible to extension Javascript code as properties on browser. Easily download samples from SampleFocus. For more information Developing Firefox extensions with WebExtensions API is a powerful and flexible way to enhance the browsing experience. Enhance your browsing experience today! Basic Firefox extension development with the WebExtension API that uses a single content script and an HTTP Request with XMLHTTPRequest. With the work the Firefox Developer Tools team has A browser extension is something you add to your browser which enhances your browsing experience by extending the capacity of your browser. Web extension template to build Chrome and Firefox extensions quickly. These examples work in Firefox Jul 17, 2025 To find your way around a WebExtension's internal structure, have a look at the Anatomy of a WebExt To use these examples in Firefox, use the most recent release of Firefox. Update: Firefox has used the WebExtensions API as its extension API since 2017. Practice typing directly on any website you visit. Below are the best Firefox add-ons Explore samples from the Chrome Extension samples repository. By following these steps While this sample does not do much it demonstrate how to get started and what to expect when developing Firefox extension. More than 150 million people use GitHub to discover, fork, and contribute to over 420 million projects. json to make sure. json file. It is designed to enhance the Contribute to struggzard/firefox-extension-sample development by creating an account on GitHub. Extensions for Firefox are built using the WebExtensions API cross-browser technology. Examples: aXe Developer Tools, Creating a Firefox extension can be difficult if you don't know the files involved and how to structure your extension folder. Check out Our top 20 essential Firefox extensions geared for people who build websites! Browser extensions empower you to customize browsing to your heart‘s content. Learn setup, installation, and real-world examples. File There is also a page on MDN Web Docs that lists the JavaScript APIs used in each example. Just click the download button on a sample after searching. In this article, we will quickly go through the files that Development Overview This tutorial has been created for individuals wanting to develop full-featured extensions for the Mozilla Firefox browser. The extension adds a red border to any pages loaded from mozilla. Open Firefox and load about:debugging in the URL bar. To illustrate how to use the WebExtension APIs, we maintain a repository of example extensions at https://github. Contribute to mozilla/policy-templates development by creating an account on GitHub. g. chrome-extension text-to-speech firefox-addon accessibility webextension webextensions firefox-extension browser-extension chrome-extensions edge-extension browser-addon firefox Love Firefox, but want to make it even better to use, or customize it fit your needs? This list of the best Firefox add-ons will put you on the path to A list of all Mozilla-recommended browser extensions on the Firefox Add-ons store (as of October 8, 2025). Simply start recording, An extension is an add-on to the browser that adds functionality. This article walks through creating an extension for Firefox, from start to finish. WebExtensions are a new way to write Firefox extensions. Building Browser Extensions is the definitive guide for how to build and publish modern Want to take the Firefox web browser to the next level? This selection of superb extensions could be just what you need, with options for Porting Chrome Extensions to Firefox - Guide to prepare, install, and debug Chrome extensions to be ported in Firefox. They’re like apps for your browser. Contribute to mozilla/extension-workshop development by creating an account on GitHub. In addition to the built-in Customize feature (see Customize Firefox controls, buttons and toolbars at Mozilla Support), you can modify the appearance of Firefox using the powerful userChrome. WebExtensions are the Policy Templates for Firefox. json, you specify basic metadata about your extension such as the name Your second extension If you've been through the Your first extension article, you've already got an idea of how to write an To try these examples, clone the repository then: load the extension from its source folder using the Load Temporary Add-on feature. com/mdn/webextensions-examples. They are written using standard Web technologies - JavaScript, HTML, and CSS - plus some dedicated . zip file, ready for submission to addons. The old extensions will not Extend the Web Get help creating and publishing Firefox add-ons that make browsing smarter, safer, and faster. To test it out, type 'cs' into the awesome bar followed by a search string (e. Either way, you can enhance the built-in Firefox developer tools by adding a new tab to the developer toolbar. Understanding Firefox Extension Architecture At its core, a Firefox extension (or WebExtension) is a packaged collection of files that work together Introduction to WebExtensions If you’ve ever wondered how to customize your Firefox browser to do just about anything you can imagine, you’re in the right place. The extension adds a red border to any pages loaded from Each example is in a top-level folder and includes a short README explaining what it does. org (AMO). We encourage you to visit Extension Workshop to learn more Deep dive into developing Firefox extensions. The namespace "manifest" is handled specially, it describes the Download Firefox Extensions to add features that customize browsing. WebExtensions are a cross-browser system for developing browser add-ons. Note: Firefox add-ons and browser extensions Extensions – also known as Firefox Add-ons – are extra features you can download and install to add more functionality Install the web-ext tool, change into the directory of the example extension you'd like to install, and type web-ext run. Using manifest. org or any of its subdomains. Extensions provide a simple and powerful way to personalize your browsing experience. Add-ons allow developers to extend and modify the functionality of Firefox. In Google Chrome, this Facebook Container is an extension by Mozilla Firefox that will separate your Facebook use from the rest of your online activity and make it Firefox Extension Workshop. Developing Firefox extensions with WebExtensions API is a powerful and flexible way to enhance the browsing experience. Integrate Firefox extensions with Selenium for advanced browser testing and web scraping. Download TipType Typing Practice for Firefox. This project creates a custom modified Firefox runtime to allow websites to be installed as standalone apps and provides a console tool and You can build powerful browser extensions that extend Firefox’s capabilities without losing your sanity in the process. Extensions can be tools that extend the abilities of the Mozilla Firefox browser. In this guide, we’re going to build a Firefox extension from the Note: In Firefox in Manifest V2, content script requests (for example, using fetch()) happen in the context of an extension, so you must provide an absolute URL to reference page content. README. We’ll cover how to create a basic add-on, adding a popup and an options page, adding permissions, storing information, sending notifications, and Extensions and add-ons can improve your browsing experience and help you do everything from managing your passwords to recording your 3 Update 2018 This sample extension was created in 2000s and Firefox switched to a radically different extension system called "Web Extensions" in 2017. The manifest is a JSON file Need to create a Firefox add-on? It's easy! Learn how to create your first add-on, test it, share it, and even adapt it for Chrome. Where this is the case, the example declares the minimum version that it needs in the strict_min_version attribute of Use these Firefox add-ons to step up your browsing experience! The extension lives in a folder which I called sample-extension. This will launch Firefox and install the extension automatically. Click the Load Temporary Add-on button and select the manifest. json file within the directory of an example extension you'd like to install. Other types of extensions add integration with These examples work in Firefox Nightly: most work in earlier versions of Firefox, but check the strict_min_version key in the extension's manifest. A guide to launching Firefox with extensions preloaded using Selenium. About This will This article walks through creating an extension for Firefox, from start to finish. This article describes how to run these examples and lists the examples along with the WebExtension APIs they demonstrate. com without an account and limitations. Policy Templates for Firefox. Explore the anatomy of a browser add-on, WebExtensions API concepts, and the manifest. The extension stays loaded until you restart Firefox. json file is the only file that every extension using WebExtension APIs must contain. To a large extent the system is compatible with the extension API supported by In this Selenium Python tutorial, we deep dive into how you can add extensions in Firefox using the Selenium automation framework. By following these steps Download Firefox Extensions to add features that customize browsing. Ensure privacy compliance and maintain user trust. an extension is a small application that adds something new to one or more Mozilla applications. Here is a Download Firefox Extensions to add features that customize browsing. To see how an example works, install it in Firefox by following the installation instructions. The technology is developed for cross-browser compatibility: to a large extent the The best way to learn how to build Chrome extensions by example. Extensions, or add-ons, can modify and enhance the capability of a browser. This could be a general add-on, or a system add-on built in a separate Download SampleFocussed for Firefox. I'm planning to develop a simple Firefox extension that will shorten URL of a currently active tab, display a popup with the shortened URL, and place it into the clipboard. This tutorial explains how to create a Firefox extension to find all links in the current web page, highlight those which have a target attribute and alert you how many links it found. Build a cross-browser extension The introduction of the browser extensions API created a uniform landscape for the development of browser extensions. (Chrome Apps are deprecated. GitHub is where people build software. We encourage you to visit Extension Workshop to learn more about Step-by-step guide to packaging your Firefox extension into a distributable . As an example, think about an ad blocker Extension examples for Firefox developer tools. Goal Extension will have simple background script which creates loop and shows native notification with static content every 30 second. Contribute to firebug/devtools-extension-examples development by creating an account on GitHub. This tutorial focuses on extensions for Firefox, but the same (or very similar) principles Firefox policies can be specified using the Group Policy templates on Windows, Intune on Windows, configuration profiles on macOS, or by creating a file called policies. However, there are differences in the To use these add-ons, you'll need to download Firefox. If you are brand-new to add-on Download Firefox extensions and themes. example. json. Extensions can add powerful customization features to Firefox — everything from ad blockers and tab organizers to enhanced privacy features, An extension consists of a collection of files, packaged for distribution and installation. However, most examples work with earlier releases. Learn the basics of Firefox extension development. If you know JavaScript, CSS, and HTML, you can build your own. open the Extensions that use WebExtension APIs are provided with several user interface options so that their functionality can be made available to the For example, we use "Bookmark manager, URL Shortener, Text highlighter" keywords in our Chrome extension and Firefox add-on title instead of linkish because mostly the potential users Laboratory is an Firefox extension that helps you generate a proper Content Security Policy (CSP) header for your website. md firefox-code-search What it does This extension allows you to search the Firefox codebase using the awesome bar. The manifest. At the heart of the extension is a file called manifest. Use these to learn how extensions work or as starting points for building your own extensions. Browser Extension Standard - Standard for the API, supported by Mozilla, Opera Download Firefox Extensions to add features that customise browsing. Official samples for Chrome Extensions and the Chrome Apps platform. Follow best practices for collecting user data consent in your Firefox extension. Setup with React 19, Typescript and TailwindCSS - JohnBra/vite-web-extension Firefox is a popular browser among web designers and developers. pcl2fr, hbvu, ddsix, jlafu, 3s0gx, 9du3, fsfsw, 5gosa, wie9, t7xp,