Cron Explainer
Paste a cron expression and instantly see a plain-English description plus the next upcoming run times. Supports ranges, steps, lists, names and @shortcuts. Offline.
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HTTP Status Reference
A searchable reference of HTTP status codes with names, plain-English meanings and categories. Look up by code or keyword like timeout or gateway. Offline.
Page Sonification
Listen to the shape of a web page. Headings, links and images are mapped to musical tones — play the whole structure as a short sequence, or switch on live mode to hear elements as you scroll past them.
History Roulette
Take a nostalgic spin through your browsing history. One click pulls up a random page you once visited, filtered by age, so you can revisit old finds you'd otherwise forget.
Blackjack Ace – Pro
Hi‑Opt II with Ace adjustment, Kelly betting, and configurable detection.
Cart Tracker
Assists healthcare professionals with pharmaceutical data research and information gathering from regulatory websites involving drugs and their prices.
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Nightfall Dark Mode
Give every website a beautiful dark theme. Nightfall darkens pages across the web with adjustable brightness and contrast, a one-tap per-site switch, and an automatic sunset-to-sunrise night mode.
UsageX
Track Claude.ai session %, weekly %, effort levels, and token usage trends via a customizable on-page sidebar. Privacy-focused, local-first storage, with multi-account support.
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Meneame LinkBack
Recupera la funcionalidad de ir a la noticia desde el enlace del título en la portada
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![Search Geo & Settings Tuner[sham.si]](https://addons.mozilla.org/user-media/addon_icons/2983/2983096-64.png?modified=a9fdbfc0)
Search Geo & Settings Tuner[sham.si]
Customise Google search by setting location, language, currency & other parameters via a handy popup Compatible with Firefox desktop & Android
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DevVault
All the dev tools you usually paste your secrets into — running 100% offline in your browser.
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Dade Toggle
Adds a toolbar button to toggle dark mode on all active tabs using CSS filter inversion. Version 1.0: Basic toggle using invert and hue-rotate filters.
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SEO Tools by Econet
SEO Helper — Browser Extension for Fast Meta Tag Analysis & Tab Management
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Basic Bearer Headers
Generate and decode HTTP Basic and Bearer Authorization headers in one place. Encode user:pass to Base64, assemble token headers, and read existing headers back into username, password or token. Runs locally.
Emoji Sprinkler
Give web pages a cheerful upgrade by sprinkling relevant emoji after keywords such as pizza, music, star and more. Dial the amount up or down with a slider and revert to the original whenever you like.
Page Weight X-Ray
See how heavy a page really is. Breaks down total transferred bytes by resource type — scripts, CSS, images, fonts, media and more — with per-type counts and bars, using the browser's Performance API.
Page Age Checker
Reveal how fresh or stale a web page is. Fetches the page's response headers to show the Last-Modified time and how long ago that was, with quick access to older versions via the Wayback Machine.
Dead Link Finder
Quickly audit a web page for dead and broken links. Checks every link's response, highlights errors and redirects with their status codes, and shows a clean summary you can filter.
