# FontShifter

> Change the font of any website instantly. Pick from bundled Persian fonts (Dana, IRANSans, Vazir), apply them per-site or globally, and toggle right-to-left direction independently. CSP-safe and works on modern web apps.

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

## Overview

- **ID:** `fontshifter`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Amir Esfandiyari
- **Category:** appearance,language-support
- **Daily users:** 1
- **Version:** 3.0
- **Last updated:** 2026-07-13
- **First published:** 2026-07-10
- **Size:** 1.08 MB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/fontshifter/)

## Description

<strong>FontShifter changes the font of any website — with per-site or global control.</strong>

Pick from three beautiful bundled fonts (Dana, IRANSans, Vazir) and apply them to
the site you're on, or set one as the default for every site. A per-site choice
always overrides the global default.

<strong>Features</strong>
- 🎨 Bundled Persian fonts, applied with one click — no downloads.
- 🌍 Per-site or global settings.
- ↔ Independent right-to-left (RTL) toggle — change the font without flipping
  layout direction, or flip direction without changing the font.
- ⚡ Works on modern single-page apps, web components, and Shadow DOM
  (<a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/cf6f55cbba6731f7030d49478c86cb1b6c503e9ea8cb3f1a019bd0e646726ebe/http%3A//Claude.ai" rel="nofollow">Claude.ai</a>, ChatGPT, and similar sites).
- 🔒 CSP-safe: uses Constructable Stylesheets and extension-hosted fonts, so it
  never strips security headers.

All settings are stored locally on your device. FontShifter does not collect,
transmit, or sell any data.

## Rankings

- #100,392 — Overall
- #205 — shift
- #206 — font

## Permissions and access

### Permissions

- `storage`
- `tabs`

### Host permissions

- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

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

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- 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/fontshifter)