Manage preferences and add-ons
Make Firefox yours through customization settings and add-ons
- Import settings from other browsers Learn how to import or export your information between Firefox and another browser
- Video, audio and interactive settings Change how Firefox handles videos, animations, music and other interactive content
- Display and appearance Learn how to change your toolbar, font sizes and browser colors
- Manage add-ons Enhance Firefox's functionality and appearance with add-ons
In English
- Settings for web content, pop-ups, fonts, and languages
- How to change your default browser in Windows 10
- Firefox's performance settings
- Connection settings in Firefox
- Make Firefox your default browser
- Startup, home page, tabs, and download settings
- Share telemetry data with Mozilla to help improve Firefox
- Change your default search settings in Firefox
- Advanced panel - Accessibility, browsing, network, updates, and other advanced settings in Firefox
- Pop-up blocker settings, exceptions and troubleshooting
- Adobe Flash protected mode in Firefox
- Does Firefox share my location with websites?
- Use the Search bar in Firefox
- Add or remove a search engine in Firefox
- Block and unblock websites with parental controls on Firefox
- View PDF files in Firefox
- Configuration Editor for Firefox
- Frequently asked questions - Firefox add-on technology is modernizing
- Multi-Account Containers
- Search the web from the address bar
- How to disable the built-in PDF viewer and use another viewer
- Applications panel - Set how Firefox handles different types of files
- How do I use the Firefox spell checker?
- Change what Firefox does when you click on or download a file
- Change the program used to open email links
- Permission request messages for Firefox extensions
- Use the Firefox sidebar to access bookmarks, history and social features
- Allow Firefox to load multiple tabs in the background
- Use the Firefox interface in other languages with language packs
- Tips for assessing the safety of an extension
- Back up and restore information in Firefox profiles
- Firefox options, preferences and settings
- How to set the home page
- Hide or display content in New Tab
- Restore previous session - Configure when Firefox shows your most recent tabs and windows
- How do I restore my tabs from last time?
- An extension changed my home page
- Manage local site storage settings
- Recovering important data from an old profile