Open-source alternatives to Tampermonkey

This project is a reference library and collection of practical code samples for building browser extensions using WebExtensions APIs. It provides implementation guides and functional examples for core extension components, including content scripts, background processes, and browser action popups. The repository focuses on demonstrating specific implementation patterns for browser UI customization and web page manipulation. It includes samples for creating sidebars, context menus, and options pages, as well as techniques for injecting scripts and styles to alter DOM elements and page appeara

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

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FeHelper is a web browser extension toolbox and frontend development toolkit integrated into Chrome, Firefox, and Edge. It serves as a data transformation utility, a web page debugging tool, and an AI-powered coding assistant. The project distinguishes itself by integrating local models and OpenAI-compatible APIs to write, refactor, and repair code directly within the browser. It also provides capabilities for generating TypeScript schemas and Zod definitions from data samples using AI. The toolkit covers a broad range of developer utilities, including network debugging for HTTP and WebSocke

Bromite is a privacy-focused fork of the Chromium browser for Android that blocks advertisements and tracking scripts by default, enforces encrypted HTTPS connections, and prevents browser fingerprinting without requiring any extensions or manual configuration. It applies a patch-based build system to layer privacy and security modifications directly onto the upstream Chromium codebase during compilation, integrating a filter list engine for network-level ad blocking and adding noise to browser APIs to mask device identity. The browser distinguishes itself through comprehensive privacy harden

douyuEx is a Tampermonkey userscript and web interface enhancer designed to modify the functionality and appearance of a specific live streaming platform. It acts as a comprehensive automation tool and browser extension that provides a suite of utilities for managing live stream interactions, enhancing video playback, and analyzing streaming data. The project distinguishes itself through deep automation of platform-specific tasks, such as automated account check-ins, treasure box and gift packet claiming, and keyword-based chat responses. It also provides advanced interaction tools, including

PakePlus is a web-to-native converter and application packager that transforms website URLs or static directories into standalone native desktop and mobile applications. It provides a native browser shell to wrap web content, acting as a cross-platform application shell for Android, iOS, and various desktop environments. The project distinguishes itself through a cloud-based app packager, utilizing remote build pipelines to compile application binaries without requiring a local development environment. It includes a JavaScript injection tool and a system-level API bridge, allowing users to ad

I-Still-Dont-Care-About-Cookies is a browser extension and content blocker designed to remove cookie consent warnings and popups from websites. It functions as a browser privacy tool and DOM element filter that reduces website clutter and visual interruptions during web browsing. The extension identifies and hides intrusive elements by using a database of domain-specific selectors. It employs a combination of CSS injection to hide elements and JavaScript execution to remove complex interface components that cannot be hidden by stylesheets alone. The tool manages content scripts and CSS selec

notion-zh_CN is a localization proxy and translation layer designed to adapt the Notion interface for Chinese users. It functions as a serverless tool that intercepts network traffic to deliver translated interface text and localized content in real time. The project provides a specialized proxy worker that translates user interface elements and slash commands into Chinese. It further enables localized command discovery by mapping pinyin keystrokes to application functions, allowing users to trigger internal commands without using English. The system also manages network traffic routing to o

AdguardFilters is a collection of curated adblock filter lists, content blocking rulesets, and DNS blocklists. Its primary purpose is to provide the rules necessary to identify and remove advertisements, tracking scripts, and intrusive elements across web browsers and applications. The project includes specialized rules for cosmetic filtering to hide layout gaps and a malware domain database to block phishing and spyware destinations. It provides distinct filtering sets for different regions and purposes, such as social media blocking. The repository covers broad capability areas including m

jdsignbot is an automated agent designed to manage recurring account activities and incentive collection for the JD.com marketplace. It functions as a scheduled reward automator that performs daily check-ins to collect rewards without manual intervention. The bot specializes in e-commerce loyalty rewards, automating the process of claiming daily sign-in bonuses and points. It achieves this by simulating mobile device headers and managing authentication tokens to maintain persistent access to user accounts. The system integrates task scheduling and API interaction to run repetitive web task

PakePlus-Android is a tool that converts any public webpage or static frontend project into a native desktop or mobile application. It wraps web content inside a configurable WebView shell, enabling the creation of cross-platform apps for Windows, Mac, Linux, Android, and iOS from a single source. The project distinguishes itself by automating the entire packaging and compilation pipeline through GitHub Actions, requiring no local development environment or dependencies. Users configure the app name, icon, window behavior, and platform-specific settings through a guided interface or configura

FARA is a visual computer-use agent model that controls a browser by predicting screen coordinates for clicking, typing, and scrolling, without relying on DOM or accessibility trees. It is designed to automate multi-step web tasks such as searching, form filling, booking, and shopping by reasoning over visual state and decomposing tasks into sequential actions. The model uses a compact 7-billion-parameter decoder-only transformer that can run on consumer GPUs for low-latency on-device inference, or be deployed as a managed endpoint on Azure Foundry for cloud-based inference without local infr

Omni is a browser-based productivity automation tool that operates as a local extension. It provides a command-palette interface to execute workspace actions and manage browsing sessions through text-based inputs. The system allows for local-source sideloading, enabling the software to run from a local directory rather than through a centralized extension marketplace. Capabilities cover browser tab management, including programmatically switching and organizing pages. It also includes tools for bookmark organization and history search, allowing users to filter and retrieve saved pages or pre

BrowserSync is a web development synchronization tool and live reload server. It functions as a local static web server, a reverse proxy server for existing sites, and a browser testing orchestrator that coordinates page state across different browsers and physical devices. The tool is distinguished by its ability to mirror user interactions, such as clicks, scrolls, and form inputs, in real time across all connected devices. It also provides a web-based device control interface and the capability to create public URL tunnels for remote testing of local sites. The system covers a broad range

Nanobrowser is an AI browser automation tool and Chrome extension that uses large language models to execute complex, multi-step web workflows through a natural language interface. It functions as a multi-agent workflow orchestrator, coordinating specialized AI agents to plan strategies and interact with page elements to complete tasks. The system emphasizes local-first operations, acting as a local API manager that stores provider credentials and executes data processing within the browser to keep sensitive information and keys out of external servers. It utilizes a provider-agnostic API bri

This project is a high-level Python library and wrapper for Selenium designed for web browser automation and functional testing. It provides a simplified interface for controlling browsers to execute automated workflows and end-to-end tests across Chrome and Firefox. The library distinguishes itself by replacing technical CSS selectors and identifiers with label-based element discovery, allowing elements to be located via visible text. It further simplifies browser control by automating window management through page titles and handling nested frame interactions without requiring manual conte

This project is a web content filtering tool designed to remove low-quality or spammy Chinese language websites from Google search results. It functions by identifying and hiding results from unreliable domains to improve the relevance of discovered content. The tool employs pattern-matching domain filtering and curated blocklists to identify unwanted websites. It uses browser extension content scripting to scan the search engine results page and apply CSS-based element hiding to the parent containers of blocked sites.

This project is an LLM browser automation framework and AI agent browser interface. It serves as a control layer that translates natural language instructions into browser interactions using large language models, enabling AI agents to navigate and interact with web pages through standardized browser-control functions. The system functions as an RPA workflow orchestrator and headless browser management tool, capable of recording and replaying deterministic browser sequences to automate repetitive tasks. It distinguishes itself through stealth configurations, including residential proxies and

UserScripts is a collection of JavaScript browser userscripts designed to modify website behavior and add custom functionality to web browsers. It serves as a multi-purpose toolset for web page content automation, web interface enhancement, and specialized web scraping and downloading. The project distinguishes itself through a wide range of specialized utilities, including a browser-based text transformer for character encoding and terminology mapping, and tools for bypassing content censorship. It provides advanced web scraping capabilities such as deciphering obfuscated download links, agg

Reddit Enhancement Suite is a browser extension that injects JavaScript and CSS directly into the Reddit web interface to customize its layout, styling, and behavior. It operates entirely on the client side, storing user preferences locally and manipulating the page's DOM to rearrange elements, apply visual overrides, and observe mutations so that modifications persist even as new content loads dynamically. The extension provides keyboard-driven navigation for browsing posts and comments without a mouse, along with user-defined filtering that can hide or highlight comments and posts based on

Nativefier is a cross-platform desktop application builder that converts web URLs into standalone executables for Windows, macOS, and Linux. It functions as a web-to-desktop application converter, wrapping web pages in a dedicated browser window with its own launcher and identity. The tool uses an Electron-based wrapper to embed websites within a Chromium browser instance and Node.js runtime. It differentiates itself through automatic branding, extracting application names and icons from target websites to configure the desktop wrapper. The system provides mechanisms for custom styling and b

LaVague is an LLM web agent framework and large action model designed to translate natural language instructions into executable browser automation scripts. It functions as a multi-modal orchestrator that reasons over web page states and HTML content to automate multi-step tasks via a Selenium-based automation engine. The framework features a modular model provider layer, allowing users to swap between different language and vision models from providers such as Anthropic, Gemini, and Azure OpenAI. It employs a multi-modal world model to process screenshots and HTML structures, utilizing retri

This project is a collection of Python scripts and source code examples designed for learning programming fundamentals through practical application. It serves as a toolkit for web scraping and browser automation, alongside a library of utilities for data processing. The repository includes scripts for simulating human interactions to automate repetitive web tasks and online booking processes. It also provides a structured database of administrative divisions, including provinces, cities, and districts, for geographic data management and address validation. The collection covers capabilities

Adblock4limbo is a collection of JavaScript-based scripts and tools designed for web content filtering and advertisement blocking. It functions as a content filter and user script suite that removes pop-ups, banners, and trackers from websites. The project includes a bilingual web translator for side-by-side content translation, an M3U8 video link extractor for retrieving direct stream URLs, and a web content filter specifically designed to remove sponsored links and content farm entries from search engine results. Its capabilities extend to network traffic management, including request filt

bilibili-helper-o is a browser extension designed to modify the Bilibili web interface and enhance media playback and download capabilities. It functions as a playback enhancer and web interface modifier that injects custom scripts into the platform to customize the video player and layout. The project provides tools to remove regional and account-based viewing restrictions on Bilibili content. It also includes a video downloader extension capable of extracting and saving video streams from the platform to local storage for offline archiving. These capabilities are implemented through networ