# Memex

> Remember Everything You Read Online. An open-source and privacy focused extension to Full-Text Search, Annotate and Organise your Web-Research

Canonical page: [https://chrome-stats.com/d/worldbrain](https://chrome-stats.com/d/worldbrain)

## Overview

- **ID:** `worldbrain`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** WorldBrain.io
- **Category:** search-tools,bookmarks,other
- **Daily users:** 128
- **Rating:** 4.21 / 5 (58 ratings)
- **Version:** 3.20.9
- **Last updated:** 2024-08-08
- **First published:** 2017-04-08
- **Size:** 8.82 MB
- **Data as of:** 2026-09-15
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/worldbrain/)
- **Website:** [https://memex.social](https://memex.social/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/worldbrain/privacy/](https://addons.mozilla.org/firefox/addon/worldbrain/privacy/)

## Description

Memex is a Firefox add-on intended to enhance online research. Features include full-text search capability for pages and PDFs, the ability to annotate websites, a flexible organisational system for tagging and sorting into collections, and the ability to share these collections for collaboration. Importantly, it works across all devices, does not require signup, and operates offline with all data stored on your device. Memex is open-source and prioritises user privacy.

## Rankings

- #10,317 — Overall
- #365 — Bookmarks
- #20 — meme
- #31 — member
- #43 — deactivate

## Permissions and access

### Permissions

- `<all_urls>`
- `alarms`
- `bookmarks`
- `contextMenus`
- `tabs`
- `webNavigation`
- `notifications`
- `unlimitedStorage`
- `storage`
- `clipboardWrite`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Very high risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension support email may not be valid

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Review summary

### Pros

- Great for research
- Data stored on own device or cloud service
- Excitement for continued development

### Cons

- Not truly open-source
- Has bugs and annoying issues
- Requires account creation and paid membership for full features

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Source: [Chrome-Stats](https://chrome-stats.com/d/worldbrain)