Try Settings > Sync > sign out then back in. Usually fixes sync issues.

'''harshxcybersec+1''' there is no need to post this thread on this community support forum ten times. There is no form of direct chat or ticket system and creating duplicate threads is frowned upon. from https://support.mozilla.org/en-US/kb/mozilla-support-rules-guidelines <blockquote>Posting support requests Create one thread and only one thread for each subject or Mozilla product you need help with.</blockquote> If you are truly trying to get support then reply to the thread with more useful information so somebody can help you.