Firefox Add-ons Scraper

Scrape Mozilla Firefox Add-ons (addons.mozilla.org) — the catalog with 50,000+ browser extensions. Extract full metadata: name, developer, description, ratings, active users, version history, permissions, icons, and screenshots.

Data Source

This actor scrapes the Mozilla Firefox Add-ons catalog via the public AMO REST API (addons.mozilla.org/api/v5). No API key, authentication, or proxy is required — the API is fully public and open.

Note: Microsoft Edge Add-ons Store (microsoftedge.microsoft.com/addons) has no public API — the store is a JavaScript SPA with no documented backend endpoints. Firefox Add-ons covers the same browser extension niche with a fully documented, public REST API and 50,000+ extensions.

Features

• 2 scraping modes: Search by keyword/category, or Fetch by addon slug/ID
• Rich metadata: developer info, star ratings, weekly active users, weekly downloads, version, file size, permissions, tags
• 16 category options: Privacy & Security, Web Development, Shopping, Social & Communication, etc.
• 6 sort options: Recommended, Most users, Highest rated, Recently added, Name, Downloads
• No credentials required: Zero configuration, works on Apify free plan

Input

Field	Type	Description
mode	select	Required. search or getById
query	string	Keyword search query (mode: search)
category	select	Filter by category (e.g. privacy-security, web-development)
sortBy	select	Sort by: recommended, users, rating, created, name, downloads
ids	array	Add-on slugs or numeric IDs for getById mode (e.g. ublock-origin, 607454)
maxItems	integer	Max records to return (1–10000, default: 100)

Example Inputs

Search for ad blockers:

{
  "mode": "search",
  "query": "adblock",
  "maxItems": 50
}

Browse top privacy extensions:

{
  "mode": "search",
  "category": "privacy-security",
  "sortBy": "users",
  "maxItems": 100
}

Fetch specific add-ons by ID:

{
  "mode": "getById",
  "ids": ["ublock-origin", "607454"],
  "maxItems": 10
}

Output

Each record contains:

Field	Type	Description
id	string	Numeric addon ID as string
slug	string	URL slug (e.g. ublock-origin)
guid	string	Global unique identifier
name	string	Display name of the add-on
description	string	Short summary
fullDescription	string	Full detailed description
category	string	Primary category slug
categories	array	All category slugs (if multiple)
addonType	string	Always extension for browser extensions
developer	object	Developer info: name, url, username
rating	number	Average star rating (1–5)
reviewCount	integer	Total number of ratings
textReviewCount	integer	Number of written reviews
weeklyActiveUsers	integer	Average daily active users
weeklyDownloads	integer	Weekly download count
version	string	Current version number
lastUpdated	string	Last update timestamp (ISO 8601)
createdAt	string	Original creation timestamp
fileSize	string	File size in bytes
permissions	array	Required browser permissions
license	string	License name (e.g. Mozilla Public License 2.0)
iconUrl	string	URL to the add-on icon
screenshotUrls	array	URLs to preview screenshots
homepageUrl	string	Developer homepage
supportUrl	string	Support / documentation URL
tags	array	Associated tags/keywords
status	string	Listing status (e.g. public)
promotedGroups	array	Promotion groups (e.g. recommended)
extensionUrl	string	Direct AMO page URL
ratingsUrl	string	Reviews page URL
sourceUrl	string	Canonical source URL
recordType	string	Always "addon"
scrapedAt	string	Scrape timestamp (ISO 8601 UTC)

Sample Record

{
  "id": "607454",
  "slug": "ublock-origin",
  "name": "uBlock Origin",
  "description": "Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.",
  "category": "privacy-security",
  "developer": {
    "name": "Raymond Hill",
    "url": "https://addons.mozilla.org/en-US/firefox/user/98811/",
    "username": "gorhill"
  },
  "rating": 4.8003,
  "reviewCount": 21772,
  "weeklyActiveUsers": 10637458,
  "weeklyDownloads": 159216,
  "version": "1.71.0",
  "permissions": ["storage", "webRequest", "webRequestBlocking", "tabs"],
  "iconUrl": "https://addons.mozilla.org/user-media/addon_icons/607/607454-64.png",
  "extensionUrl": "https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/",
  "sourceUrl": "https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/",
  "promotedGroups": ["recommended"],
  "recordType": "addon",
  "scrapedAt": "2026-05-30T12:00:00+00:00"
}

Categories

Slug	Display Name
alerts-updates	Alerts & Updates
appearance	Appearance
bookmarks	Bookmarks
download-management	Download Management
feeds-news-blogging	Feeds, News & Blogging
games-entertainment	Games & Entertainment
language-support	Language Support
photos-music-videos	Photos, Music & Videos
privacy-security	Privacy & Security
search-tools	Search Tools
shopping	Shopping
social-communication	Social & Communication
tabs	Tabs
web-development	Web Development
other	Other

FAQs

Q: Do I need a Mozilla or Firefox account? A: No. The Firefox Add-ons API is fully public and requires no authentication.

Q: How many extensions are available? A: As of 2026, Firefox Add-ons has over 50,000 extensions and themes.

Q: What is the difference between id and slug? A: The id is a numeric identifier (e.g. 607454). The slug is a human-readable URL name (e.g. ublock-origin). Both can be used with getById mode.

Q: Can I filter by multiple categories at once? A: The current version supports single-category filtering per run. Use multiple runs with different category values to combine results.

Q: What does weeklyActiveUsers represent? A: This is the average number of users who use the extension per day (the Mozilla API calls this average_daily_users, but it reflects weekly-normalized active use).

Q: Are themes included? A: No, only extensions (type=extension) are returned by default.