Web Browser

PCjs runs online emulators for DOS, Windows, OS/2, and other vintage PC systems in a web browser.

F.B. Purity customizes Facebook and filters application spam and other unwanted feed items with a browser extension.

ffmpeg-web provides web and desktop interfaces for converting video, audio, and images with FFmpeg or ffmpeg.wasm.

Grammarly's browser extension checks grammar and clarity as users write across websites.

otr.to enables people to chat directly with each other through a web browser.

NASA's Eyes offers browser-based three-dimensional visualizations for exploring NASA data and imagery.

Use Keyword Surfer, a free Chrome extension, to view search volume, cost per click, and estimated traffic in Google results.

Terraria Map Editor Web lets users open, view, and edit Terraria world files in a browser.

Custom Dark Mode applies customized dark styles to webpages through a browser add-on.

Library Extension helps readers check library availability while browsing for books.

Decompiler Explorer compares output from multiple decompilers in a web browser.

Tab Deck manages browser tabs and groups, letting users save, restore, and organize browsing sessions.

ArchiveWeb.page captures webpages interactively in a browser and lets users replay the resulting web archives with ReplayWeb.page.

Browse this curated collection of browser extensions for GitHub, organized into categories and updated daily.

CommentShark finds and displays comments from public YouTube videos, letting users search or read a video's discussion.

AHA Music identifies songs from uploaded audio using audio fingerprinting and a database of music fingerprints.

Tuesday JS provides a free, open-source visual novel editor that runs in a web browser.

External Application Button adds a browser toolbar button and customizable context-menu items for launching external applications.

Control Panel for Twitter adds timeline controls and interface improvements through a browser extension.

Originality.ai checks writing for AI-generated text, plagiarism, grammar, content quality, and factual issues.

A browser extension, Control Panel for YouTube adds settings for adjusting playback and site behavior.

Track and compare GitHub star growth for open-source repositories with Star History.

aw-watcher-web records browser activity for ActivityWatch through a cross-browser extension.

Brave is a web browser for desktop and mobile that blocks tracking software; its site also lists Brave Search and a device-wide VPN.