Hello, Recovery keys may be used to [https://support.mozilla.org/en-US/kb/how-change-or-reset-your-mozilla-account-password#w_reset-password-and-keep-encrypted-data-like-bookmarks-history-and-passwords keep encrypted data like bookmarks, history and passwords when resetting your Mozilla account password]. What to you mean by "activate the recovery key"? To generate and store your account recovery key: # Click the menu button [[Image:Fx89menuButton]] to open the menu panel. # Click your Mozilla account name at the top (or sign in if you're not already). #; [[Image:Firefox_Mozilla Account Fx139_Menu account option]] # Click "'''Manage account'''". #* The ''Mozilla account'' page will open in a new tab. # Under ''Security'', next to ''Account recovery key'', click '''Create'''. # On the on onboarding prompt, click '''Get started'''. # Enter your password and then click '''Create account recovery key'''. # Your account recovery key has been created! Click '''Download and continue''' to download a file with it. #; [[Image:Mozilla Account_Recovery key created|width=400]] #* You can also copy your key and then click '''Continue without downloading'''. In that case, make sure to save it manually. #* Store your account recovery key in a safe location where you won't lose it. # Optionally, enter a hint to make it easier for you to remember where you stored your key. The hint will be shown during the password reset. # Click '''Finish'''.