# Firefox Add-ons Scraper (`crawlerbros/firefox-addons-scraper`) Actor

Scrape Mozilla Firefox Add-ons (addons.mozilla.org) - search 50,000+ browser extensions by keyword or category, or fetch by addon ID/slug. Returns full metadata: developer, ratings, user counts, version, permissions, icons, screenshots.

- **URL**: https://apify.com/crawlerbros/firefox-addons-scraper.md
- **Developed by:** [Crawler Bros](https://apify.com/crawlerbros) (community)
- **Categories:** Automation, Developer tools, Integrations
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

from $3.00 / 1,000 results

This Actor is paid per event and usage. You are charged both the fixed price for specific events and for Apify platform usage.
Since this Actor supports Apify Store discounts, the price gets lower the higher subscription plan you have.

Learn more: https://docs.apify.com/actors/running/actors-in-store.md#pay-per-event

## What's an Apify Actor?

Actors are web data automations that power AI and operations. They run on the Apify platform to scrape websites, process data, connect APIs, and automate workflows.
In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours,
and optionally produces a well-defined JSON output, datasets with results, or files in key-value store.
In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server.
Actors are written with capital "A".

## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
The best way to integrate Actors is as follows.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
- **Agentic workflows and local Actor development** — [Agent Skills](https://apify.com/.well-known/agent-skills/index.json) with the [Apify CLI](https://docs.apify.com/cli/docs.md): `npm install -g apify-cli`, then `apify login`.
- **JavaScript/TypeScript projects** — the official [JS/TS client](https://docs.apify.com/api/client/js/docs.md): `npm install apify-client`.
- **Python projects** — the official [Python client](https://docs.apify.com/api/client/python/docs.md): `pip install apify-client`.
- **Any other language** — the [REST API](https://docs.apify.com/api/v2.md).

For usage examples, see the [API](#api) section below.

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).

# README

## 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:**

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

**Browse top privacy extensions:**

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

**Fetch specific add-ons by ID:**

```json
{
  "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

```json
{
  "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.

# Actor input Schema

## `mode` (type: `string`):

What to fetch from the Firefox Add-ons catalog.

## `query` (type: `string`):

Keyword(s) to search for in add-on name and description (mode: search).

## `category` (type: `string`):

Filter results to a specific category (mode: search). Leave empty to search all categories.

## `sortBy` (type: `string`):

Sort order for search results.

## `ids` (type: `array`):

Add-on slugs (e.g. `ublock-origin`) or numeric IDs (e.g. `607454`) to fetch directly.

## `maxItems` (type: `integer`):

Maximum number of add-ons to return.

## Actor input object example

```json
{
  "mode": "search",
  "query": "adblock",
  "category": "",
  "sortBy": "recommended",
  "ids": [],
  "maxItems": 100
}
```

# Actor output Schema

## `addons` (type: `string`):

Dataset containing all scraped Firefox browser extension records.

# API

You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.

## JavaScript example

```javascript
import { ApifyClient } from 'apify-client';

// Initialize the ApifyClient with your Apify API token
// Replace the '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

// Prepare Actor input
const input = {
    "mode": "search",
    "query": "adblock",
    "category": "",
    "sortBy": "recommended",
    "ids": [],
    "maxItems": 100
};

// Run the Actor and wait for it to finish
const run = await client.actor("crawlerbros/firefox-addons-scraper").call(input);

// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
    console.dir(item);
});

// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

```

## Python example

```python
from apify_client import ApifyClient

# Initialize the ApifyClient with your Apify API token
# Replace '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

# Prepare the Actor input
run_input = {
    "mode": "search",
    "query": "adblock",
    "category": "",
    "sortBy": "recommended",
    "ids": [],
    "maxItems": 100,
}

# Run the Actor and wait for it to finish
run = client.actor("crawlerbros/firefox-addons-scraper").call(run_input=run_input)

# Fetch and print Actor results from the run's dataset (if there are any)
print(f"💾 Check your data here: https://console.apify.com/storage/datasets/{run.default_dataset_id}")
for item in client.dataset(run.default_dataset_id).iterate_items():
    print(item)

# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

```

## CLI example

```bash
echo '{
  "mode": "search",
  "query": "adblock",
  "category": "",
  "sortBy": "recommended",
  "ids": [],
  "maxItems": 100
}' |
apify call crawlerbros/firefox-addons-scraper --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,crawlerbros/firefox-addons-scraper"
        }
    }
}

```

The hosted server signs you in with OAuth on first connect, so no API token belongs in this config. Clients without OAuth support can send an `Authorization: Bearer <APIFY_API_TOKEN>` header instead, using a token from API & Integrations in Apify Console (https://console.apify.com/settings/integrations).

## OpenAPI specification

Download the OpenAPI definition: https://api.apify.com/v2/actors/hLckf3LOPqKUg9fA8/builds/1MOTsCNuQ5bn3dYc6/openapi.json