Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
    • Other Browser Sites
    • Add-ons for Android
Log in
Preview of Font Changer

Font Changer by Hareb Lounes

Change any page font instantly with a simple click, choose from a list of over 800 different fonts and SAVE your settings for the website.

3.6 (17 reviews)3.6 (17 reviews)
72 Users72 Users
Download Firefox and get the extension
Download file

Extension Metadata

Screenshots
About this extension
Font Changer allows you to easily change the fonts of any website you visit. Choose from over 800 beautiful Google Fonts and customize the reading experience to match your preferences and save your settings for the site.

🎨 Key Features

Multi-Context Font Control
- Apply different fonts to headings, body text, or all text independently
- Mix and match fonts for perfect typography combinations
- Each context (All Text, Headings, Body) can be customized separately

Per-Site Preferences
- 📥Save different settings for each website
- Automatic font application when you revisit sites
- Easy management: Reset individual sites or clear all at once

Smart Font Management
- ⭐ Favorites: Star your favorite fonts for quick access
- 🕐 Recent fonts: Quickly reuse fonts you've tried recently
- 🔍 Search: Find fonts instantly with real-time search
- 📂 Filter by category: Serif, Sans-serif, Monospace, Display, Script

Advanced Typography Designer Mode
- Letter spacing: Adjust character spacing for better readability
- Line height: Control the space between lines
- Word spacing: Modify spacing between words
- Text transform: Apply UPPERCASE, lowercase, or Capitalize

Font Size Control
- Independent size scaling for each context (80% - 150%)
- Works even without changing fonts - perfect for accessibility
- Preserves the site's design while improving readability

Smart Preview System
- Real-time preview: See changes instantly as you adjust settings
- Context badges: Always know if you're previewing or have saved settings
- Reset button: Quickly undo previews without saving

Beautiful User Interface
- 🎨 Brand Theme and Light Theme options
- Clean, modern design
- Smooth animations and transitions
- Compact, scrollable font list for easy browsing

Privacy & Performance
- All preferences stored locally in your browser
- No data sent to external servers
- Lightweight and fast
- Export/import your settings for backup

🚀 How It Works
  1. Click the Font Changer icon in your browser toolbar
  2. Browse, search, or filter through 800+ Google Fonts
  3. Click any font to preview it instantly
  4. Choose your context: All Text, Headings, or Body
  5. Adjust size and typography with Designer Mode
  6. Click "Save All" to remember settings for this site

🔒 Privacy

Font Changer respects your privacy:
- No tracking or analytics
- No external data collection
- All settings stored locally
Rated 3.6 by 17 reviewers
Log in to rate this extension
There are no ratings yet

Star rating saved

5
7
4
3
3
3
2
2
1
2
Read all 17 reviews
Permissions and data

Required permissions:

  • Access your data for all websites
Learn more
More information
Version
2.0
Size
207.06 KB
Last updated
9 days ago (Dec 5, 2025)
Related Categories
  • Feeds, News & Blogging
  • Web Development
  • Appearance
License
Mozilla Public License 2.0
Version History
  • See all versions
Add to collection
Report this add-on
Go to Mozilla's homepage

Add-ons

  • About
  • Firefox Add-ons Blog
  • Extension Workshop
  • Developer Hub
  • Developer Policies
  • Community Blog
  • Forum
  • Report a bug
  • Review Guide

Browsers

  • Desktop
  • Mobile
  • Enterprise

Products

  • Browsers
  • VPN
  • Relay
  • Monitor
  • Pocket
  • Bluesky (@firefox.com)
  • Instagram (Firefox)
  • YouTube (firefoxchannel)
  • Privacy
  • Cookies
  • Legal

Except where otherwise noted, content on this site is licensed under the Creative Commons Attribution Share-Alike License v3.0 or any later version.