# ScriptCat

> Everything can be scripted, allowing your browser to do more!

Canonical page: [https://chrome-stats.com/d/scriptcat?hl=es](https://chrome-stats.com/d/scriptcat?hl=es)

## Overview

- **ID:** `scriptcat`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** 王一之
- **Category:** web-development,language-support
- **Daily users:** 10,006
- **Weekly downloads:** 1,234
- **Rating:** 4.74 / 5 (110 ratings)
- **Version:** 0.16.15
- **Last updated:** 2026-05-20
- **First published:** 2021-02-28
- **Size:** 4.35 MB
- **Data as of:** 2026-09-05
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/scriptcat/)
- **Website:** [https://github.com/scriptscat/scriptcat](https://github.com/scriptscat/scriptcat)

## Description

ScriptCat is a browser extension that runs user scripts, built to empower your browser with more automation. It provides a framework for background scripts and supports Greasemonkey/Tampermonkey-style scripts, plus a powerful online editor to craft code with ease.

Key features include cloud sync, script subscriptions, compatibility with other user-script managers, background and scheduled scripts, a rich API, a sandbox that safely grants permissions, and an editor with API auto-completion and ESLint.

## Rankings

- #769 — Overall
- #29 — Language Support
- #71 — Web Development
- #3 — education
- #3 — script
- #7 — education

## Permissions and access

### Permissions

- `tabs`
- `cookies`
- `storage`
- `downloads`
- `webRequest`
- `<all_urls>`
- `contextMenus`
- `notifications`
- `clipboardWrite`
- `webRequestBlocking`

### Content script matches

- `<all_urls>`

## Safety

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

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has medium user count. Unpopular extensions may not be stable or safe.

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

## Review summary

Users praise ScriptCat as useful and feature-rich and thank the developers. The dominant issue is incomplete localization: several reviews request proper English (en-GB), note untranslated UI/description text in Chinese, and ask for additional languages such as Brazilian Portuguese. Localization tools/platforms were also mentioned as a possible aid.

### Pros

- App is useful and works well (users describe it as "very good"/"very useful")
- Offers several interesting or valuable features (feature-rich)
- Positive sentiment toward the developers (users thank/appreciate the devs)

### Cons

- Incomplete or poor English translation — many interface strings are still in Chinese
- Description and some UI text are untranslated or inconsistent (makes it hard to use for non-Chinese speakers)
- Requests for additional locales (notably Brazilian Portuguese/Portuguese) — localization support is lacking

## Similar extensions and apps

- [ScriptCat Beta](https://chrome-stats.com/d/scriptcat-pre) — 325 users, 5.00 / 5
- [Script Runner](https://chrome-stats.com/d/script-runner) — 396 users, 5.00 / 5
- [Scripts runner](https://chrome-stats.com/d/scripts-runner) — 56 users, 4.67 / 5
- [Ace Script](https://chrome-stats.com/d/ace-script) — 1,067 users, 3.75 / 5
- [User Scripts Manager](https://chrome-stats.com/d/scripts-manager) — 1 users
- [Content Scripts Extension](https://chrome-stats.com/d/content-scripts-extension) — 1 users
- [Smart Script Manager](https://chrome-stats.com/d/smart-script-manager) — 2 users
- [Miniscripts](https://chrome-stats.com/d/miniscripts)
- [Violentmonkey](https://chrome-stats.com/d/violentmonkey) — 176,631 users, 4.73 / 5
- [Wildmonkey](https://chrome-stats.com/d/wildmonkey) — 19 users, 3.50 / 5
- [run-a-script](https://chrome-stats.com/d/run-a-script) — 123 users, 5.00 / 5
- [Tampermonkey](https://chrome-stats.com/d/tampermonkey) — 786,881 users, 4.70 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/scriptcat?hl=es)