# Code Expert Master

> Adds some missing features to Code Expert

Canonical page: [https://chrome-stats.com/d/code-expert-master?hl=ja](https://chrome-stats.com/d/code-expert-master?hl=ja)

## Overview

- **ID:** `code-expert-master`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** micha4w
- **Category:** other
- **Daily users:** 1
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.2.7
- **Last updated:** 2025-03-29
- **First published:** 2023-11-27
- **Size:** 391 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/code-expert-master/)
- **Website:** [https://github.com/micha4w/cx-master](https://github.com/micha4w/cx-master)

## Description

If you are used to using a full fledged Code Editor, then you will have had bad experiences with Code Expert, there's a distinct lack of customization and language support. That's what this Add-on intends to fix.

Currently it supports these features:
<ul>  <li>Keybindings: allows you to use different default keybindings, for example Vim and VSCode</li>  <li>Options
  <ul>    <li>Click link to go to file: If you compile a C++ file and get a compilation error, you can Click on the file location in the Terminal and it will take you right to the Location of the error</li>    <li>Fix scrollbar in Firefox: Code-Expert has an annoying bug in Firefox where the page is 50000 pixels wide, which adds an annoying scrollbar, this option fixes that</li>    <li>Parse and Display Errors: If you compile a C++ file it will read the Output in the Terminal and add Error Markers inside the File</li>    <li>Make FileTree Navigable: If you focus the FileTree, you can use your arrow keys (or hjkl if you have Vim mode enabled) to naviate the File Structure</li>  </ul>  </li>  <li> Keyboard Shortcuts:
  <ul>    <li>Compile: Opens the Terminal and hits the Compile button (if available)</li>    <li>Run: Opens the Terminal and hits the Run button</li>    <li>Run Tests: Opens the Terminal and hits the Test button</li>    <li>Format File: Uses either Ace of (if configured) an LSP to Format the current file</li>    <li>Comment selection: Toggles the comments in the selected Lines</li>    <li>Next Suggestion: Goes to the next Suggestion in Autocomplete (useful for Vim Mode)</li>    <li>Previous Suggestion: Goes to the previous Suggestion in Autocomplete (useful for Vim Mode)</li>    <li>Focus shortcuts: Focuses different parts of the editor</li>  </ul>  </li></ul>
Advanced, if you have the time and will to try and setup a Native Executable, you can also run an LSP and get these features:
<ul>  <li>Auto Complete: Actually useful Auto Complete</li>  <li>Code Diagnostics: Shows you Errors and Warnings before you hit compile</li>  <li>Hover Diagnostics: Tells you everything about a Symbol when you hover over it</li>  <li>Formatting: Improved formatting</li></ul>

## Rankings

- #83,431 — Overall

## Permissions and access

### Permissions

- `nativeMessaging`
- `storage`

### Content script matches

- `expert.ethz.ch`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Injects scripts into web pages, which may alter or extract site contents, resulting in a substantial risk.
- 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/code-expert-master?hl=ja)