Open-source alternatives to Chrome Extensions Samples

gmail.js is a JavaScript library and development kit for building browser extensions that interact with the Gmail web interface. It provides a framework for automating communication workflows, extracting email metadata and content from active browser sessions, and injecting custom UI elements. The library distinguishes itself by enabling interaction with the Gmail interface through DOM manipulation and event interception without requiring external API authentication. It includes a toolkit for programmatically adding buttons, menus, and modal windows directly into the application layout. The

Chrome-extension-webpack-boilerplate is a developer workflow toolkit and webpack template for building browser extensions with modern JavaScript, automatic live reloading, and asset bundling. It organizes extension source code into structured folders for popups, options pages, background scripts, and manifests. The development workflow features a hot reload development server and automatic browser refreshing whenever source files change. It includes capabilities to exclude specific content scripts from hot reload cycles and write those designated bundle files directly to disk. The toolkit a

This project is a boilerplate for Chrome extension development, utilizing React and Vite to build custom functionality and user interfaces for web browsers. The development workflow emphasizes fast iteration through hot-reload capabilities and module rebuilding, which reflect code changes in the browser without manual reloading. It includes a type-safe internationalization system for managing multi-language support and automated end-to-end testing to verify feature stability across different browser packages. The architecture provides a component-based framework for creating popups, options

WXT is a development framework and build tool for creating browser extensions. It transforms source code into browser-compatible formats and provides a structured environment for managing the compilation and asset management of web extensions. The framework automates the definition of background and content scripts by mapping the file-system structure directly to extension manifests. It includes a development environment with hot module replacement to apply real-time code updates in the browser without manual restarts. The toolset covers the full extension lifecycle, including project bootst

《Chrome插件开发全攻略》配套完整Demo，欢迎clone体验

This project is a development template and build system designed for creating browser extensions. It provides a unified framework that allows developers to maintain a single codebase for extensions targeting Chrome, Firefox, and Opera. The tool streamlines the development cycle by normalizing browser-specific manifest requirements and providing a build pipeline that handles asset transformation and dependency resolution. It includes a live-reloading server to facilitate immediate feedback during development and supports the injection of environment variables to manage configuration settings a

Supermium is a Chromium-based web browser backported to run on legacy versions of Windows. It uses an abstraction layer to adapt modern engine requirements, enabling contemporary web browsing on older operating systems that lack native support for current Chromium versions. The project integrates content decryption modules to allow the playback of DRM-protected media streams on unsupported platforms. It also features the ability to disable machine-specific encryption, allowing user profiles to be portable across different hardware installations. The browser includes a functional sandbox to i

Firefox is a cross-platform web browser engine designed to render web content, execute JavaScript, and manage secure browsing sessions. It utilizes a multi-process isolation architecture that distributes browser tasks across independent operating system processes to ensure stability and prevent site-specific failures from impacting the entire application. The engine incorporates a sandboxed execution environment to restrict web content and untrusted scripts to isolated memory compartments, enforcing security policies that prevent unauthorized access to system resources. The project distinguis

WebLLM is a library for executing large language models directly within web browsers. It provides a framework for building conversational artificial intelligence applications that perform inference locally, ensuring user data privacy by eliminating the need for external server dependencies. The project distinguishes itself by leveraging browser-native graphics APIs to perform intensive machine learning computations on the client side. It maintains application responsiveness by offloading heavy model tasks to background threads and ensures continuous operation through service workers that func

Betterfox is a curated configuration profile for the Firefox web browser designed to optimize speed, security, privacy, and user interface minimalism. It provides a set of preferences and settings to harden the browser environment and improve overall performance. The project distinguishes itself through targeted configuration suites that refine scrolling behavior, font rendering, and interface elements while removing visual distractions from the new tab page and address bar. It includes specific directives to disable telemetry, tracking, and digital rights management. Its broader capabilitie

Track-extension is a browser extension for Chrome and Firefox that records work hours and manages active timers directly from the browser toolbar and centralized popup menus. It functions as a productivity utility by embedding interactive time measurement controls into third-party websites and project management tools, preventing context switching while tracking task duration. The extension injects timer buttons into external web applications by matching page URLs against registered rule sets and manipulating the host document structure at runtime. It configures these embedded timers with des

This project is an AI-powered English education tool and browser extension designed for immersive language learning. It functions as a proficiency training suite that integrates AI tools and linguistic analysis directly into external websites and streaming video platforms. The system employs a DOM injection model to add interactive overlays and toolbars to web pages. It uses large language model APIs to provide real-time translations and maps curated pronunciation and grammar exercises to specific timestamps in external media. The tool covers a broad range of English proficiency training, in

N-Tab is a browser extension designed to manage browser tab lifecycles by consolidating open web pages into organized, virtual sessions. It functions as a session management tool that allows users to group tabs into custom folders, recover recently closed pages, and reduce system memory usage by offloading active tabs into a centralized interface. The extension distinguishes itself through its support for cross-device synchronization, enabling users to back up and share saved tab configurations across multiple browser instances via remote cloud storage. It also provides a declarative command

GitHub-Dark is a browser extension theme and collection of user style sheets designed to provide a comprehensive dark mode aesthetic for the GitHub interface. It functions by injecting custom style rules directly into the browser to override default website colors, fonts, and layout properties, aiming to improve visual comfort and readability during extended use. The project distinguishes itself through its focus on deep integration and visual consistency. It includes specialized support for syntax highlighting across various programming languages and notebook environments, ensuring that code

This project is a browser extension and metadata tool designed to restore the visibility of dislike counts on YouTube videos. It functions as a client-side video enhancer that modifies the web interface to display engagement statistics that are otherwise hidden. The tool restores these metrics by combining archived data and user votes with statistical extrapolations. This data is retrieved via a public API using unique video identifiers to help users evaluate video content and identify low-quality or misleading videos. The extension utilizes content scripts and client-side patching to inject

This project is a cross-platform chatbot framework designed to integrate generative artificial intelligence models into messaging services. It provides a unified architecture for building and deploying automated bots that maintain consistent conversation state, user identity, and interaction logic across multiple messaging platforms from a single codebase. The framework distinguishes itself through a modular adapter system that normalizes platform-specific webhooks and events into a standardized internal schema. It includes a comprehensive toolkit for constructing rich, interactive user inter

Filament is a full-stack framework for building administrative panels and management interfaces within the Laravel ecosystem. It provides a declarative, component-based architecture that allows developers to construct complex, data-driven applications using server-side configuration objects rather than manual HTML. By inspecting database model structures and relationships, the framework automates the generation of CRUD interfaces, forms, and data tables, significantly reducing boilerplate code. The project distinguishes itself through a highly modular and extensible design that supports custo

lf is a terminal-based file manager and TUI file explorer that provides keyboard-driven navigation for browsing and organizing files and directories. It operates as a shell-integrated tool that synchronizes the current working directory with the calling shell and supports vi-style keybindings for filesystem operations. The project distinguishes itself through its ability to render images directly in the terminal via the SIXEL graphics protocol and its shell-driven execution model, which allows users to extend functionality using external shell scripts and commands. It also implements a server

Playwright is a comprehensive browser automation framework designed for end-to-end testing and web workflow automation. It provides a unified API to drive web applications across multiple browser engines, enabling developers to simulate complex user interactions, perform web scraping, and validate application behavior in consistent, isolated environments. The framework distinguishes itself through a web-first testing paradigm that prioritizes stability and resilience. By utilizing an auto-waiting actionability engine and accessibility-tree-based locators, it eliminates common sources of test

Zellij is a terminal multiplexer and workspace manager designed to organize command-line sessions into persistent, reconfigurable layouts. It functions as a terminal plugin framework, allowing users to extend their environment with modular, event-driven components that interact with the host through a structured message-passing protocol. The project distinguishes itself through a layout-engine-based architecture that decouples visual pane arrangements from process execution, enabling automated and repeatable terminal workflows. It includes integrated support for web-based remote access, facil

This project is a boilerplate and development environment designed for building browser extensions using React and TypeScript. It provides a pre-configured foundation that streamlines the creation of cross-browser extensions, ensuring compatibility across platforms like Chrome, Firefox, and Edge through automated manifest packaging and build pipelines. The framework distinguishes itself by integrating isolated component development, allowing developers to verify interface elements in a sandboxed environment before full integration. It also incorporates utility-first styling and static type ch

Cat-catch is a browser-based media utility designed to detect, capture, and manage web-based video and audio resources. It functions as a comprehensive sniffing and download management system, enabling users to identify hidden or protected media assets directly from active web pages. The tool specializes in reconstructing fragmented streaming protocols, such as DASH and M3U8, into complete files while providing options for real-time stream recording and playback control. The project distinguishes itself through its deep integration with local system environments and external automation tools.

ChatGPT-Shortcut is a prompt engineering toolkit and management library designed to organize, refine, and deploy structured instructions for large language models. It functions as a browser-based prompt injector and a self-hosted prompt database, allowing users to maintain a curated collection of specialized templates. The project features a community prompt gallery where users can publish, discover, and vote on effective templates. It distinguishes itself by integrating these libraries directly into chat interfaces via userscripts or browser extensions, enabling access to prompts through sid

Greasemonkey is a Firefox extension that functions as a JavaScript userscript engine and manager, executing custom scripts on target web pages to automate tasks and alter page functionality. It injects user code into the isolated execution context of web pages before or during page load, allowing users to modify content, behavior, and styling dynamically on specific websites. The extension integrates natively into the browser extension system using background processes and messaging interfaces. It parses special comment blocks inside scripts to determine execution permissions, URL matching pa

Tamperchrome is a browser-based API debugger and network interceptor designed for the real-time manipulation of HTTP traffic. It functions as a proxy alternative that allows for the capturing and modification of requests and responses directly within the browser environment. The tool enables API response mocking and the alteration of server data before it reaches the page. It provides capabilities for modifying outgoing request headers and bodies, as well as injecting content into response bodies to test client-side behavior. The project covers a broad surface of network debugging, including

The Great Suspender is a Chrome browser extension and memory optimization tool designed to manage browser tab states and reduce system resource consumption. It functions as a browser tab manager that frees up system RAM by freezing dormant browser pages. The tool improves browser performance and stability by suspending inactive tabs to limit the number of active processes running in the background. It reduces overall memory and CPU usage by freezing tabs until a user interacts with them again. The extension handles browser memory management and performance optimization through the monitoring