# Fast Calc

> Extension for quick and simple on page calculations.

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

## Overview

- **ID:** `fast-calc`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Ankit Kumar
- **Category:** other
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 3.0.0
- **Last updated:** 2025-08-06
- **First published:** 2025-08-03
- **Size:** 12 MB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/fast-calc/)

## Description

This extension reads the on page text selection done by the user. Extracts the number if found any, then provide the option to perform simple calculation on that.

## Rankings

- #131,206 — Overall
- #241 — fast vpn

## Permissions and access

### Permissions

- `scripting`
- `activeTab`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Moderate 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 has low 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).

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