If your bookmarks disappeared after a crash or update, you can often restore them from a hidden backup file on your computer. Recover Google Chrome bookmarks - Microsoft Q&A
Chrome sometimes places "Mobile Bookmarks" as the default selected folder when you save a new bookmark, which causes confusion when you try to find it later on your computer.
If none of the above works and the Bookmarks file is missing or empty, you have two final rescue options:
Press Ctrl + Shift + B (Windows/ChromeOS) or Cmd + Shift + B (Mac).
Before we can fix anything, we need to find the physical file. Chrome does not store bookmarks as a simple list in the cloud (unless you are synced). Locally, they exist in a JSON file without an extension, simply named .
