# Script Timer CM

> Measure execution time of JavaScript snippets on web pages to help developers analyze performance.

Canonical page: [https://chrome-stats.com/d/script-timer-cm?hl=ja](https://chrome-stats.com/d/script-timer-cm?hl=ja)

## Overview

- **ID:** `script-timer-cm`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Removed
- **Publisher:** Katakuri Hire
- **Version:** 1.3
- **Last updated:** 2026-03-12
- **First published:** 2026-03-09
- **Size:** 14 KB
- **Data as of:** 2026-05-19
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/script-timer-cm/)

## Description

Measure execution time of JavaScript snippets on web pages to help developers analyze performance.

## Permissions and access

### Permissions

- `activeTab`
- `tabs`
- `contextMenus`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** High 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 is not longer available in the store

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

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Source: [Chrome-Stats](https://chrome-stats.com/d/script-timer-cm?hl=ja)