Your Firefox Account syncs your browsing information, such as history, logins and bookmarks, across your other devices. We recommend changing your password periodically, especially if you notice strange activity, to prevent others from logging in to your account.
- Click the menu button to open the menu panel.
- Click your Firefox Accounts (your email address or sign in), then click (or visit https://accounts.firefox.com).
- On the Firefox Account page, click in the Password section.
- Follow the steps to enter your old and new passwords, then click to finish.