# Telescope CSS

> Modify CSS rules from any web by editing code in a complete and customizable text editor with contextual autocomplete, syntax highlighting, instant application of changes and much more!

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

## Overview

- **ID:** `telescope-css`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** TecnoSamba
- **Category:** web-development,appearance
- **Version:** 1.0
- **Last updated:** 2026-07-17
- **First published:** 2026-07-14
- **Size:** 875 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/telescope-css/)
- **Website:** [https://github.com/tecnosamba/telescopeCSS](https://github.com/tecnosamba/telescopeCSS)

## Description

Welcome to <strong>TelescopeCSS</strong>!

Have you ever wanted to have a CSS editor directly in your browser? Now you can with TelescopeCSS! Whether you want to try a new style in your web page, or just play with CSS, here you will find whatever you need to accomplish your goal.

This extension includes a fully-charged code editor that includes <strong>syntax highlighting</strong>, <strong>contextual autocomplete</strong>, both <strong>light and dark themes</strong> and the possibility of customizing each individual token creating TelescopeCSS themes that can be easily shared as they are basically JSON files!

As mentioned before, TelescopeCSS provides you of a useful <strong>contextual autocomplete</strong> feature. To activate it, just type a dot (.) to list the classes used on the web page of the current tab or a hashtag (#) to display the IDs.

Happy CSS coding!

## Rankings

- #143,293 — Overall
- #148 — hashtag

## Permissions and access

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** High 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/telescope-css)