Mozilla/Firefox has nothing to do with Google. Unfortunately we can not help you.

Though maybe : Firefox Sync as a back up service. This is not what Sync is designed to do. The Firefox Sync service takes a copy of the data you wish to include and transfers it to a second device (typically a mobile device such as a tablet or a telephone) running a copy of Firefox. The storage in between all attached devices is both temporary and fragile and is not stable enough to be (and is not designed as) a reliable backup service.

If you have a copy of your Firefox profile for desktop Firefox, you may be able to recover your bookmarks and other data. Please have a read of this article.

If you have a copy of your data on a mobile version of Firefox, please follow these instructions to connect it to Firefox Sync to copy your data. https://support.mozilla.org/en-US/kb/how-do-i-set-sync-my-computer#w_connect-additional-devices-to-sync_

Please let us know if this solved your issue or if need further assistance.

the main problem I can't login to my Mozilla account to recover my bookmark What can I do please help me

As stated we do not do that. If you read it is temporary and not a backup service. If you have sync'd with another device your bookmarks will be available to you on the other device.

Please let us know if this solved your issue or if need further assistance.

I use only Firefox on desktop I have changed the OS on my laptop then I try to login into my account on Mozilla the email is correct and also password but it says The confirmation email we sent to ramzyhassan5@gmail.com was returned and we’ve locked your account to protect your Firefox data. and I have closed this gmail account from while if you could help me to recover data on it and any details you need from me I am ready for that