Hi. My name is***** you for your question and the opportunity to assist.
When you refresh Firefox it creates a folder on your desktop called Old Firefox Data.
Do you see such a folder on your desktop?
OK. At the top of the Firefox window do you see the File-Edit-View-History-Bookmarks-Tools-Help
If you don't see those, right-click on the 3-horizontal-bar icon in the upper right corner and
select Menu bar and it should put them there.
Then click Bookmarks>>Show All Bookmarks.
Then click Import and Backup and select Restore.
If there are restoreable bookmarks, you'll see a list of them.
Refreshing Firefox shouldn't remove your bookmarks
and if it does they should be in the Old Firefox Data folder which, by default,
Firefox puts on your desktop.
If there's a possibility the folder was deleted, check for it in your Recycle Bin.
click the start button and in the search box type "old firefox data" without the quotes. You might get lucky.