# Check Browsers Support

> A browser extension to check if a given web technology is supported by browsers

Canonical page: [https://chrome-stats.com/d/check-browsers-support](https://chrome-stats.com/d/check-browsers-support)

## Overview

- **ID:** `check-browsers-support`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Phuoc Nguyen
- **Category:** web-development
- **Version:** 1.0.0
- **Last updated:** 2020-09-16
- **First published:** 2020-09-16
- **Size:** 383 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/check-browsers-support/)
- **Website:** [https://checkbrowsers.support](https://checkbrowsers.support/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/check-browsers-support/privacy/](https://addons.mozilla.org/firefox/addon/check-browsers-support/privacy/)

## Description

Check Browsers Support is a Firefox add-on that allows you to easily check if a given web technology is supported by different browsers. It uses the latest data from MDN, works offline, and can find the best match from selected text. With just two simple steps, you can check browser support on any website.

## Rankings

- #144,742 — Overall
- #135 — support

## Permissions and access

### Permissions

- `activeTab`
- `contextMenus`
- `storage`
- `https://api.gumroad.com/*`

### 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 website URL may be invalid

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

## Similar extensions and apps

- [Website Technology Detector](https://chrome-stats.com/d/website-technology-detector) — 283 users, 5.00 / 5
- [Browserling - Cross-browser testing](https://chrome-stats.com/d/cross-browser-testing) — 188 users, 1.75 / 5
- [WhatStack](https://chrome-stats.com/d/whatstack) — 12 users
- [ServerCheck](https://chrome-stats.com/d/servercheck) — 1 users
- [Website Compatibility Checker](https://chrome-stats.com/d/website-compatibility-checker) — 1 users
- [Website Accessibility Ck](https://chrome-stats.com/d/website-accessibility-ck)
- [Compare Text](https://chrome-stats.com/d/compare-text) — 18 users
- [TestingBot](https://chrome-stats.com/d/testingbot) — 1 users
- [Web Developer Checklist](https://chrome-stats.com/d/webdeveloperchecklist) — 644 users, 4.25 / 5
- [WhatRuns](https://chrome-stats.com/d/whatruns) — 4,614 users, 4.05 / 5
- [WhatStack: Tech Stack Scanner](https://chrome-stats.com/d/whatstack-tech-stack-scanner)
- [Compat Report](https://chrome-stats.com/d/compat-report) — 356 users, 4.64 / 5

---

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