WCAG Check
Check colour contrast ratio for WCAG AA and AAA
Headers Spy
View and search HTTP response headers for any endpoint
KB Shortcuts
Quick reference cheatsheet of browser keyboard shortcuts
Text Minify
Minify CSS JS or HTML by removing whitespace and comments
Mesh Grad
Create beautiful mesh gradient backgrounds for web
Flexbox Gen
Visual CSS flexbox generator with live preview and copy
Grid Forge
Visual CSS grid generator with rows columns and gaps
Hue Build
Build and export CSS color palettes with harmony modes
Cookie Jar
Browse delete and copy cookies for the active tab domain
Custom API Tester
Send HTTP requests with custom method headers and body
Grid Builder
Design CSS grid templates visually and copy CSS
CIDR Calc
IP subnet calculator with CIDR notation and host range
CORS Unbound
Bypass CORS and rewrite HTTP headers directly in the browser, automatically injecting the correct Access-Control-* headers derived from the browser’s CORS request headers.
Nightly Network AdBlock (prototype)
Blocks many ads using webRequest blocking + content-script heuristics.
3 人のユーザー
Audio Editor - By Mr.Bear
Professional audio editing and recording suite for Firefox. Multi-track editing, effects (reverb, delay, chorus, EQ), podcast production, recording, mixing, and export to MP3/WAV/FLAC.
3 人のユーザー
Flex Forge
Interactive CSS flexbox code generator with preview
MD Syntax
Searchable Markdown reference card with copy support
Expr Calc
Calculate any math expression with history and copy
Card Valid
Check credit card validity detect type and issuer
Subnet Calc
Calculate subnet mask network and broadcast address
Specificity
Analyse CSS selector specificity scores and ranking
CSS Anim
Generate CSS keyframe animations with visual controls
A11y Color
Accessibility colour contrast checker for web design
