Cookie Transfer
Copy session cookies from one site to your active tab with a single click or keyboard shortcut. Perfect for testing staging, localhost, and mirror environments without re-logging in.
Liner (Music Lyrics)
Lyrics Synced lyrics with meaning & translation and you set where they start. YouTube, Spotify, Apple Music, SoundCloud.& meaning, in time with the music.
Glassy New Tab
"Created by the team at ToolMaster." A minimal, glassmorphic new tab with clock, weather, and notes — fast, private, and distraction-free.
2 users
DevToys New Tab
DevToys New Tab for Firefox: 80+ tools — JSON, Base64, hash, UUID, JWT, formatters, converters, network & images. Offline. Search uses your default engine. GA4 usage analytics; tool inputs stay local.
2 users
Dark Light: Web Theme Auto Mode
Control each website's appearance with Follow System, Preserve Site Design, Force Dark, and Force Light modes.
LinkaGoGo Bookmark Manager
Save and search your LinkaGoGo bookmarks from any page.Save and search your LinkaGoGo bookmarks from any page. One-click save with folders, tags, and AI-powered suggestions.
2 users
JSON Explorer
Beautify and explore JSON data directly in your browser. Automatically formats raw JSON pages with syntax highlighting, collapsible nodes, and easy navigation.
2 users
Hackerfeed for Hacker News
Replaces the Firefox homepage with Hackerfeed, providing a curated feed of tech news and updates. Powered by Hacker News.
2 users
