All my bookmarks have gone

Hi, @m_zaki. @eljuno may be headed this way, but you can also check for profiles in Explorer. Here are a couple of related posts that should be helpful with the caveat that before you try any of the things described, you should create backup copies of whatever profile folders are there. Bear in mind that the file structures are essentially the same across all platforms with slight path differences, so posts showing macOS can still be useful to Windows/Linux folks and vice versa.