# PoliCanvas

> Lightweight Browser Extension that prevents re-downloading files from Canvas LMS by caching them locally.

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

## Overview

- **ID:** `policanvas`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** vicbguti
- **Category:** download-management,appearance,bookmarks
- **Version:** 2.0.0
- **Last updated:** 2026-07-01
- **First published:** 2026-06-28
- **Size:** 63 KB
- **Data as of:** 2026-09-12
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/policanvas/)

## Description

PoliCanvas is a premium, lightweight browser extension (Manifest V3) that prevents duplicate file downloads from Canvas LMS by caching files locally inside secure sandboxed storage and serving them instantly.

## Rankings

- #138,784 — Overall

## Permissions and access

### Permissions

- `downloads`
- `storage`
- `webRequest`
- `webRequestBlocking`

### Host permissions

- `https://*.instructure.com/*`
- `https://aulavirtual.espol.edu.ec/*`

### Content script matches

- `*.instructure.com`
- `aulavirtual.espol.edu.ec`

## Safety

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

### Analysis details

- Allows the extension to observe and analyze traffic in flight for the selected hosts.
- 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).

## Similar extensions and apps

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- [Canvas Privacy Protection](https://chrome-stats.com/d/canvas-privacy-protection) — 12 users
- [Canvas Defender](https://chrome-stats.com/d/no-canvas-fingerprinting) — 2,891 users, 3.64 / 5
- [Canvas Blocker - Fingerprint](https://chrome-stats.com/d/canvas-blocker-fingerprint) — 17 users
- [Canvas Blocker - Fingerprint Protect](https://chrome-stats.com/d/canvas-blocker-no-fingerprint) — 424 users, 3.81 / 5
- [CanvasPlus](https://chrome-stats.com/d/canvasplus) — 684 users, 3.83 / 5
- [Fixing Canvas](https://chrome-stats.com/d/fixing-canvas) — 2 users
- [Canvas Blocker](https://chrome-stats.com/d/canvas-blocker) — 6 users
- [Canvas File Formatter](https://chrome-stats.com/d/canvas-file-formatter) — 9 users, 5.00 / 5
- [Power+](https://chrome-stats.com/d/dtps) — 11 users, 5.00 / 5
- [CanvasBlocker](https://chrome-stats.com/d/canvasblocker) — 38,307 users, 4.58 / 5
- [Canvas Fingerprint Defender](https://chrome-stats.com/d/canvas-fingerprint-defender) — 1,161 users, 3.97 / 5

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