Hi, sorry to hear that. If you Refreshed Windows and not formatted then you can find it in the Folder old windows on C:\ The will be in the same file structure as this location (more or less).

• https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data
• https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile
• bookmarks and history: places.sqlite
• bookmark backups: compressed .jsonlz4 JSON backups in the bookmarkbackups folder

fyi for the future, maybe email them to yourself :

• https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer
• https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles

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

Thanks for the help. But I installed windows with formatting :( I thought when I logged in with old password the bookmarks will remain. I thought they were somewhere in Mozilla's server or something like that

No, Sync is for Syncing devices (plural) so if you have them on another device you can get them, if not they are gone.

If you Formatted they are gone

If you Refreshed Win 10 they are on C:\ in Old.windows

Thank you