Firefox Uninstall

So I'm trying to remove my firefox data such as my bookmarks and saved log ins from a work computer because I retired. I signed out of firefox on the computer. I uninstalled it on this computer and then reinstalled and it's still showing the information even after logging out and restarting computer. I also deactivated the computer from my list of devices on my firefox account and that still did not remove the data. Can you please assist me in this removal of my firefox information from this computer.

Thank you, Cherie