Open Source JavaScript Browser Extensions and Plugins
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JavaScript Browser Extensions and Plugins
View 205 business solutionsBrowse free open source JavaScript Browser Extensions and Plugins and projects below. Use the toggles on the left to filter open source JavaScript Browser Extensions and Plugins by OS, license, language, programming language, and project status.
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Go from Code to Production URL in SecondsSkip the Kubernetes configs. Cloud Run handles HTTPS, scaling, and infrastructure automatically. Two million requests free per month.
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Ship Agents FasterGemini Enterprise Agent Platform lets you rapidly build, scale, govern and optimize production-ready agents grounded in your organization's data. The platform enables developers to build custom or pre-built agents for virtually any use case. New customers get $300 in free credits.
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Don't waste your time with compliance. Universal Bypass circumvents annoying link shorteners. Universal Bypass bypasses templates that are used on thousands of domains and it would be impossible for me to keep a complete list of domains that are bypassed. You would have to get a new Universal Bypass version and accept its new permissions for each new bypass. Custom Bypasses would be pretty pointless if you could only create them for sites that are already bypassed. Also known in the options as "Give and take the destinations of unbypassable shorteners.", this feature exists to bypass a respectable amount of link shorteners using CAPTCHAs and other forms of backend validation to make sure you've actually waited before you can proceed to the target link, to share this target with other Universal Bypass users, who come across the same link in the future, so they can proceed to the target immediately.
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Buster
Captcha solver extension for humans
Save time by asking Buster to solve captchas for you. Buster is a Firefox extension which helps you to solve difficult captchas by completing reCAPTCHA audio challenges using speech recognition. Challenges are solved by clicking on the extension button at the bottom of the reCAPTCHA widget. It is not guaranteed that challenges are always solved, the limitations of the technology need to be considered. The continued development of Buster is made possible thanks to the support of awesome backers. If you'd like to join them, please consider contributing with Patreon, PayPal or Bitcoin. The success rate of the extension can be improved by simulating user interactions with the help of a client app. Follow the instructions from the extension's options to download and install the client app on Windows, Linux and macOS, or get the app from this repository. -
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DuckDuckGo Browser Extensions
DuckDuckGo Privacy Essentials browser extension for Firefox, Chrome
Privacy, simplified. One super-charged app, multiple types of privacy protection. The DuckDuckGo app provides the most comprehensive online privacy protection with the push of a button. With one download, you get a new everyday browser that offers seamless protection while you search and browse, and even access to tracking protection for emails you receive. Protecting your privacy online is like protecting your home. Locking the front door won’t stop the most determined folks from getting inside, especially if you’ve left the back door and windows unlocked and an extra key under the doormat. That’s why we offer multiple types of privacy protection, most of which aren’t offered in most popular browsers by default. DuckDuckGo Private Search comes built-in, so you can easily search the web without being tracked. Automatically stop most hidden trackers (3rd-party scripts) from loading, which prevents companies from collecting and using (e.g. sale, ads, etc.). -
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Adguard Browser Extension
AdGuard browser extension
AdGuard is a fast and lightweight ad-blocking browser extension that effectively blocks all types of ads and trackers. AdGuard is a fast and lightweight ad blocking browser extension that effectively blocks all types of ads and trackers on all web pages. We focus on advanced privacy protection features to not just block known trackers, but prevent web sites from building your shadow profile. Unlike its standalone counterparts (AG for Windows, Mac), the browser extension is completely free and open source. You can learn more about the difference here. AdGuard does not collect any information about you, and does not participate in any acceptable ads program. The only source of income we have is selling premium versions of our software, and we intend to keep it that way. AdGuard for Windows is not just another ad blocker, it is a multipurpose tool that combines all necessary features for the best web experience. It blocks ads and dangerous websites, speeds up page loading, etc. -
Custom VMs From 1 to 96 vCPUs With 99.95% UptimeLive migration and automatic failover keep workloads online through maintenance. One free e2-micro VM every month.
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SweetAlert2
Beautiful, responsive, highly customizable popup boxes
SweetAlert2 offers a beautiful, responsive, highly customizable and accessible alternative to JavaScript’s popup boxes. It’s got zero dependencies, is compatible with most modern browsers, and offers a wealth of customization options. Your popup boxes can look exactly how you want them with various options for additional content, custom positioning, animation, background, and so much more! SweetAlert2 also supports various input types and offers a range of different themes. Visit their official website, https://sweetalert2.github.io/ to see all these custom features in action! -
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Translate Web Pages
Translate your page in real time using Google or Yandex
Translate your page in real time using Google or Yandex. It is not necessary to open new tabs. Now works with the NoScript Extension. Your current page is translated without having to open new tabs. It is possible to change the translation language. You can select to automatically translate. To change the translation engine just touch the Google Translate icon. To translate any website it is necessary to access and modify the text of the web pages. And the extension can only do that, with that permission. The pages are translated using the Google or Yandex translation engine (you choose). We do not collect any information. However, to translate, the contents of the web pages will be sent to Google or Yandex servers. You can also install via crx file, download the file using a download manager/or firefox. Activate developer mode and drag the file into the chromium extension manager. It doesn't work on Chrome/Edge. -
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cat-catch
Cat scratch chrome resource sniffing extension
cat-catch is a resource sniffing extension that can help you filter and list resources on the current page. Maozha is open source. Anyone can download and modify it and put it on the app store. There are already many fake Maozha with the ad code added. Please pay attention to your own data security. All installation addresses are subject to github and user documentation. Chromium kernel version 93 or later is required after version 1.0.17. If it is lower than 93, please use version 1.0.16. The extension is a general sniffing tool and has the same function as the browser DevTools. It does not decrypt any website. Any content downloaded by the user has nothing to do with the extension. Please pay attention to the permissions and copyrights of the downloaded resources. -
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user.js
Firefox privacy, security and anti-tracking: a comprehensive user.js
A user.js is a configuration file that can control Firefox settings - for a more technical breakdown and explanation, you can read more in the wiki. The arkenfox user.js is a template that aims to provide as much privacy and enhanced security as possible and to reduce tracking and fingerprinting as much as possible - while minimizing any loss of functionality and breakage (but it will happen). Everyone, experts included, should at least read the wiki, as it contains important information regarding a few user.js settings. Note that we do not recommend connecting over Tor on Firefox. Use the Tor Browser if your threat model calls for it, or for accessing hidden services. Also be aware that the arkenfox user.js is made specifically for desktop Firefox. Using it as-is in other Gecko-based browsers can be counterproductive, especially in the Tor Browser. -
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SingleFile
Web Extension for saving a copy of complete web page in a single file
Web Extension for Firefox/Chrome/MS Edge and CLI tool to save a faithful copy of an entire web page in a single HTML file. SingleFile is a Web Extension (and a CLI tool) compatible with Chrome, Firefox (Desktop and Mobile), Microsoft Edge, Vivaldi, Brave, Waterfox, Yandex Browser, and Opera. It helps you to save a complete web page into a single HTML file. Wait until the page is fully loaded. Click on the SingleFile button in the extension toolbar to save the page. You can click again on the button to cancel the action when processing a page. Open the context menu by right-clicking the SingleFile button in the extension toolbar or on the webpage. It allows you to save the current tab, the selected content, the selected frame. With auto-save active, pages are automatically saved every time after being loaded (or before being unloaded if not). Right-click on the SingleFile button and select "Manage extension" (Firefox) / "Options" (Chrome) to open the options page. -
Demo Series - Small Business Backup By VeeamWatch this on-demand demo series and learn how to protect your Microsoft 365 data with clear, simple, actionable steps that are easy to implement for businesses of all sizes.
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Lighthouse
Automated auditing, performance metrics, & best practices for the web
Lighthouse is an open-source, automated tool that analyzes and audits web apps and web pages in order to improve their quality. Lighthouse collects modern performance metrics and insights on developer best practices; auditing for performance, accessibility, SEO and more. After auditing it produces a report either in JSON or HTML. Included in the report is a reference doc that explains the importance of the audit and how to fix the problem areas, which you can use to improve the web app or web page. Lighthouse can be integrated directly into the Chrome DevTools with its own panel. To run it, you would simply have to select the Lighthouse panel and click on "Generate report". It can also be run from the command line, or as a Node module. -
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Stylus for Chrome
Stylus - Userstyles Manager
Stylus is a fork of Stylish for Chrome, also compatible with Firefox as a WebExtension. "Stylus" is a fork of the popular Stylish extension which can be used to restyle the web. Not "ish", but "us", as in "us" the actual users. Stylus is a fork of Stylish that is based on the source code of version 1.5.2, which was the most up-to-date version before the original developer stopped working on the project. The objective in creating Stylus was to remove any and all analytics, and return to a more user-friendly UI. We recognize that the ability to transfer your database from Stylish is important, so this is the one and only feature we've implemented from the new version. Two different optional code validators with user-configurable rules: CSSLint and Stylelint. Both validators use Web Worker API to run in a separate background thread inside the editor tab without blocking your interaction with the code. -
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Turbo Download Manager
A portable modern multi-threading download manager for all platforms
A modern multi thread download manager for Windows, Linux, Mac OS, Firefox, Chrome, Opera and Android devices. For bug reports visit: https://github.com/inbasic/turbo-download-manager/issues For FAQs visit: http://add0n.com/turbo-download-manager.html Turbo Download Manager is an stand-alone application without any dependencies. It should run out of the box. Just set the download location while adding the first job request. If you have a browser and would like to integrate this download, use these browser extensions: Firefox: https://addons.mozilla.org/firefox/addon/turbo-download-manager/ Opera: https://addons.opera.com/extensions/details/turbo-download-manager/ Chrome: https://chrome.google.com/webstore/detail/turbo-download-manager/kemfccojgjoilhfmcblgimbggikekjip -
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Automa
A chrome extension for automating your browser by connecting blocks
Automa is a browser extension for browser automation. From auto-fill forms, doing a repetitive task, taking a screenshot, to scraping data of the website, it's up to you what you want to do with this extension. Automa has provided various kinds of blocks that will help you do automation, and all you need to do is connect them. Want your workflow to run every day or every time you visit a specific website? You can set the workflow trigger on the trigger block. Try a workflow from the marketplace. There're dozens of workflows been shared by Automa users which you can add and customize. Auto-fill forms, do a repetitive task, take a screenshot, or scrape website data, the choice is yours. You can even schedule when the automation will execute! Browse the Automa marketplace where you can share and download workflows with others. -
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Privacy Badger
Privacy Badger automatically learns to block invisible trackers
Privacy Badger is a browser extension that stops advertisers and other third-party trackers from secretly tracking where you go and what pages you look at on the web. If an advertiser seems to be tracking you across multiple websites without your permission, Privacy Badger automatically blocks that advertiser from loading any more content in your browser. To the advertiser, it’s like you suddenly disappeared. Privacy Badger was born out of our desire to be able to recommend a single extension that would automatically analyze and block any tracker or ad that violated the principle of user consent; which could function well without any settings, knowledge, or configuration by the user; which is produced by an organization that is unambiguously working for its users rather than for advertisers; and which uses algorithmic methods to decide what is and isn’t tracking. -
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Retire.js
Scanner detecting the use of JavaScript libraries
There is a plethora of JavaScript libraries for use on the web and in node.js apps out there. This greatly simplifies, but we need to stay updated on security fixes. "Using Components with Known Vulnerabilities" is now a part of the OWASP Top 10 and insecure libraries can pose a huge risk for your web app. The goal of Retire.js is to help you detect the use of versions with known vulnerabilities. Scan a web app or node app for use of vulnerable JavaScript libraries and/or node modules. grunt-retire scans your grunt-enabled app for use of vulnerable JavaScript libraries and/or node modules. Scans visited sites for references to insecure libraries and puts warnings in the developer console. An icon on the address bar displays will also indicate if vulnerable libraries were loaded. Retire.js has been adapted as a plugin for the penetration testing tools Burp and OWASP ZAP. -
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chromium-web-store
Allows adding extensions from chrome web store on ungoogled-chromium
Allows adding extensions from chrome web store on ungoogled-chromium. Also adds semi-automatic extension updating. This extension brings the following functionality to ungoogled-chromium (and other forks that lack web store support). Allows installing extensions directly from chrome web store. Automatically checks for updates to your installed extensions and displays them on the badge. Pin the Chromium Web Store badge in your browser's toolbar. (Badges are hidden by default). The badge will show a red number indicating available updates. Click on the badge, then click the name of any extension to install the latest version. This method will work for non-webstore extensions as well if they support it, including chromium web store itself. (See the section below if you are an extension developer and don't have your extension listed in the chrome web store.) -
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Progressive Web Apps for Firefox
A tool to install, manage and use Progressive Web Apps (PWAs)
A tool to install, manage and use Progressive Web Apps (PWAs) in Mozilla Firefox. Progressive Web Apps (PWAs) are web apps that use web APIs and features along with a progressive enhancement strategy to bring a native app-like user experience to cross-platform web applications. Although Firefox supports many of Progressive Web App APIs, it does not support functionality to install them as a standalone system app with an app-like experience. This project creates a custom-modified Firefox runtime to allow websites to be installed as standalone apps and provides a console tool and browser extension to install, manage and use them. Command-line tool to install, manage and run Progressive Web Apps in Firefox. Extension to set up native programs, and install, manage and run PWAs and their profiles directly from the main Firefox browser. Isolated Firefox installation and profile(s) that stores the PWAs. -
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uBlock
uBlock: a fast, lightweight, and lean blocker for Chrome, Firefox
uBlock: a fast, lightweight, and lean blocker for Chrome, Firefox, and Safari. Available on the Chrome Web Store or for manual installation. Available to install from the homepage. Available for install from the homepage or from the App Store. Available on the Firefox Add-ons site, or for manual installation. Opera shares Chrome's underlying engine, so you can install uBlock simply by grabbing the latest release for Chrome.To benefit from uBlock's higher efficiency, it's advised that you don't use other blockers at the same time (such as AdBlock or Adblock Plus). uBlock will do as well or better than most popular ad blockers. It's important to note that blocking ads is not theft. Don't fall for this creepy idea. The ultimate logical consequence of blocking = theft is the criminalisation of the inalienable right to privacy. -
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Ghostery
Ghostery Browser Extension for Firefox, Chrome, Opera and Edge
Ghostery helps you browse smarter by giving you control over ads and tracking technologies to speed up page loads, eliminate clutter, and protect your data. This is the unified code repository for the Ghostery browser extensions in Chrome, Firefox, Opera and Edge. Browse the web safer, faster & with less annoying ads. Equipped with award-winning AI anti-tracking technology to browse the websafe and quickly. Ghostery helps you stay informed about what companies are tracking you by listing the trackers on each website you visit. Granular control within the detailed view allows you to block and unblock specific trackers. With one click, always allow or forbid Ghostery to block trackers and protect your personal data on a specific site. Smart-Browsing automatically optimizes page performance as your browse. -
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Google Unlocked
Google Unlocked browser extension uncensor google search results
Google Unlocked is an open-source browser extension, which unlocks hidden google search results. The extension scans hidden links that were censored on Google search results due to complaints. The tool scans those complaints and extracts the links from them, puts the links back into Google results, all in a matter of seconds. The extension was taken down by Google from the Chrome store. Please use manual install. Download the latest zip release from Google Unlocked repository releases. Extract the zip file to a permanent path (Chrome will need to load it every time it restarts). Open Chrome and go to chrome://extensions/ and check the box for Developer mode in the top right. Click the Load unpacked extension button and select the unzipped folder for your extension to install it. After installing the extension, every time you Google a keyword, it will transparently scan the hidden URLs and injects them at the bottom of the page. -
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StackEdit
In-browser Markdown editor
Unrivalled writing experience. StackEdit’s Markdown syntax highlighting is unique. The refined text formatting of the editor helps you visualize the final rendering of your files. StackEdit provides very handy formatting buttons and shortcuts, thanks to PageDown, the WYSIWYG-style Markdown editor used by Stack Overflow. Whether you write, you review, you comment… StackEdit's layout provides you with the flexibility you need, without sacrifice. StackEdit’s Scroll Sync feature accurately binds the scrollbars of the editor panel and the preview panel to ensure that you always keep an eye on the output while writing. StackEdit can sync your files with Google Drive, Dropbox and GitHub. It can also publish them as blog posts to Blogger, WordPress and Zendesk. You can choose whether to upload in Markdown format, HTML, or to format the output using the Handlebars template engine. -
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slick
The last carousel you'll ever need
slick is an open source, responsive carousel plugin that offers a great number of breakpoints, CSS3 transitions, touch events and so much more. It creates fully responsive, customizable and mobile-friendly carousels that can work with any html element. Everything you’ll ever need for your carousel, slick can achieve quickly and easily. It features a comprehensive range of settings, events, methods and more so you can build a carousel in exactly the way you want. It supports IE8+ as well as most modern browsers (Chrome, Firefox, Safari). See it in action in demos on http://kenwheeler.github.io/slick/ -
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FastClick
Easy-to-use library to remove click delays on browsers with touch UIs
FastClick is a simple, easy-to-use library for eliminating the 300ms delay between a physical tap and the firing of a click event on mobile browsers. The aim is to make your application feel less laggy and more responsive while avoiding any interference with your current logic. FastClick is developed by FT Labs, part of the Financial Times. Note: As of late 2015 most mobile browsers - notably Chrome and Safari - no longer have a 300ms touch delay, so fastclick offers no benefit on newer browsers, and risks introducing bugs into your application. Consider carefully whether you really need to use it. The library has been deployed as part of the FT Web App. FastClick doesn't attach any listeners on desktop browsers. -
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Replace Google CDN
A Chrome plugin: Replace Google CDN with domestic
For well-known reasons, just substituting a domain name can continue to use the front-end public library provided by Google. Likewise, referencing these resources via the scripttag will instantly speed up your website access! Many websites, especially foreign websites, use Google's CDN in order to speed up the website. But in China, due to some reasons, the world's fastest CDN has become the world's slowest. So, I wrote this plugin/extension to replace Google's CDN with a domestic one. This plugin/extension can replace the cdn resources with domestic ones. -
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bootstrap-datepicker
A datepicker for twitter bootstrap
Bootstrap-datepicker provides a flexible datepicker widget in the Bootstrap style. Versions are incremented according to semver. As with bootstrap’s own plugins, datepicker provides a data-api that can be used to instantiate datepickers without the need for custom javascript. You can disable datepicker’s data-api in the same way as you would disable other bootstrap plugins. Most options can be provided via data-attributes. An option can be converted to a data-attribute by taking its name, replacing each uppercase letter with its lowercase equivalent preceded by a dash, and prepending “data-date-” to the result. Methods are called on a datepicker by calling the datepicker function with a string first argument, followed by any arguments the method takes.
