# SMS Grades Overview

> Shows a grades overview on the sms.eursc.eu dashboard.

Canonical page: [https://chrome-stats.com/d/sms-grades-overview](https://chrome-stats.com/d/sms-grades-overview)

## Overview

- **ID:** `sms-grades-overview`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** KOZELJ Michele
- **Category:** search-tools,appearance
- **Version:** 1.8.8
- **Last updated:** 2026-05-17
- **First published:** 2026-03-25
- **Size:** 661 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/sms-grades-overview/)

## Description

SMS Grades Overview

A browser extension that adds a grades overview widget to the <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/be3e428f7571d4d4457c8379132b7c0e89b09316de80ce8fac634297ce63c215/https%3A//sms.eursc.eu" rel="nofollow">sms.eursc.eu</a> dashboard.

What it does
<ul><li>Injects a <strong>grades overview widget</strong> at the top of the SMS dashboard page</li><li>Shows a <strong>general average</strong> across all enabled subjects</li><li>Shows a <strong>card per subject</strong> with the weighted average grade, color-coded</li><li>Shows a <strong>recent grades table</strong> with the last 10 graded assignments across all subjects</li><li>Automatically <strong>discovers enrolled courses</strong> from the SMS grades page</li><li>Allows <strong>hiding/showing courses</strong> via the extension popup (persisted in local storage)</li></ul>
How it works
<ol><li><strong>Authentication</strong>: The extension piggybacks on the user's existing SMS session (PHPSESSID cookie set after SAML/ADFS login via Office 365). No credentials are stored or handled by the extension.</li><li><strong>Course discovery</strong>: On dashboard load, the extension fetches <code>grades_details.php</code> and parses the <code>&lt;select id="course_id"&gt;</code> dropdown to discover all enrolled courses dynamically.</li><li><strong>Grade fetching</strong>: For each visible course, the background service worker fetches the course's grade page. The content script parses the HTML table to extract dates, types, descriptions, weights, and grade percentages.</li><li><strong>Weighted averages</strong>: Computed as <code>sum(grade * weight) / sum(weight)</code>, skipping ungraded entries. The general average is the mean of all subject averages.</li><li><strong>Course visibility</strong>: Hidden courses are stored in <code>chrome.storage.local</code> under the key <code>hiddenCourses</code>. The extension popup provides a checklist to toggle visibility.</li></ol>

## Rankings

- #137,393 — Overall

## Permissions and access

### Permissions

- `storage`

### Host permissions

- `https://sms.eursc.eu/*`

### Content script matches

- `sms.eursc.eu`

## Safety

- **Risk impact:** Low risk impact
- **Risk likelihood:** High 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/sms-grades-overview)