Sleep Calculator
Find optimal wake times based on 90-min sleep cycles
RobotsMaker
Build robots.txt files visually — add user-agents, allow/disallow rules and sitemap
PicInspect
Inspect all images on any page — see size, format and alt text
AI Doc Suite
Instant access to AI Doc Suite — a browser-native AI workspace for documents, data, PDFs, and media.
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Derpibooru Tag Autocomplete
An alternative tag autocompletion for derpibooru.org, using either a combination of local autocomplete and its API, or with a fully local autocomplete
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Tomotoro Clock
Stay productive with timed focus and rest intervals
ListenerMap
Map every event listener on the page — element, event type and handler
Type Detective
Discover typefaces and font stacks on any website
MetaExports
Collect and export full page metadata — all meta tags, schema.org and social cards
DotDash
Encode and decode Morse code — dots and dashes with optional audio output
QR Code Fast
QR Code Fast lets you quickly access websites by scanning QR codes directly from FF's address bar on Android.
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Browser Sticky Notes Pro – Notes, Tables and more
Opens a Sticky Note at the top right when invoked using SHIFT+ALT+N.
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MeasureBox
Measure anything — offline unit converter for 6 categories
LocalPeek
Peek inside page storage — browse localStorage and sessionStorage
TypeReplace
Swap the typeface on any page with any Google Fonts font
LinkAudit
Scan page links for broken URLs — status codes, redirects and response times
ClickTrack
Track click counts on the current page and across sites today
Font Inspector
Detect and list all fonts used on the current page
Music Link Redirection
Redirect Spotify, YouTube Music and more to your prefered streaming service, powered by Linktree Songlink/Odesli
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Quick Notes
Domain-scoped notes that stay attached to each website
