Frequent Topics
Explore the knowledge base.
Still need help?
We’re here for you. Post a question to our support forums and get answers from our community of experts.
Ask the CommunityFeatured Articles
Manage my default search engines in Firefox for Android
Firefox for Android lets you add, remove and change your default search engine. Learn to manage your search engines with just a few taps.
Manage the devices linked to your Mozilla account
Find solutions to help you manage the devices and services connected to your Mozilla account.
Sync Firefox data
Learn what Sync is, how it works, what it lets you do and how to avoid data loss with Sync, Firefox and your Mozilla account.
Update Firefox to prevent add-ons issues from root certificate expiration
Update to Firefox 128+ by March 14, 2025, to avoid issues with add-ons, DRM media and essential features due to an expiring root certificate.
Join Our Community
Grow and share your expertise with others. Answer questions and improve our knowledge base.