Hi Mike, it's not normal to lose bookmarks in an update. Let's try to sort this out.

Step 1: Are the desired bars visible?

If you are missing your Bookmarks Toolbar or top Menu Bar, try using the Toolbars list to turn those back on. Either:

• right-click (on Mac Ctrl+click) a blank spot on the tab bar (or right-click the "+" button)
• (menu bar) View > Toolbars
  On Windows, tap the Alt key to activate the menu bar temporarily.
• in Customize mode > Toolbars button (see: Customize Firefox controls, buttons and toolbars)

To turn on the Bookmarks Toolbar or Menu Bar, or other bars, click it on the list.

If the Bookmarks Toolbar does not appear, let me know, as there may be a special procedure for that.

Step 2: Is the Bookmarks Toolbar empty?

If there is absolutely nothing on the Bookmarks Toolbar, not even the basic bookmarks that come with a new Firefox, try using the "Restore Defaults" button at the bottom of the Customize screen: Customize Firefox controls, buttons and toolbars.

Any improvement?

Step 3: Are bookmarks listed in the Library window?

You can call that up using Ctrl+Shift+b or "Show All Bookmarks".

By default, Firefox shows the contents of the "Other Bookmarks" category. Do you see anything?

To check the Bookmarks Menu or Bookmarks Toolbar, click that category in the left column, and look for the contents in the right column. Anything?

If your bookmarks are not listed: try the Restore feature. See: Restore bookmarks from backup or move them to another computer.

If no backups are listed on the Restore menu: do you have a folder named Old Firefox Data on your Windows desktop?

Step 4: Are bookmarks working at all?

If Restore fails, check whether you can save a new bookmark successfully. You can use the star icon in the address bar, or press Ctrl+d to test.

If you cannot save new bookmarks:

(A) Exit Firefox, shut down Windows, and restart it to release file locks and finish pending updates. Any improvement?

(B) If that doesn't fix it, check this article: Fix "The bookmarks and history system will not be functional" error message

Any progress so far?

Mike, thank you for sharing your add-ons list. Could you review the extensions and see whether they are all things you want to run? Some of them are bundled with free software downloads and cause problems. Here are the details on how to check.

You can view, disable, and often remove unwanted or unknown extensions on the Add-ons page. Either:

• Ctrl+Shift+a (Mac: Command+Shift+a)
• "3-bar" menu button (or Tools menu) > Add-ons
• type or paste about:addons in the address bar and press Enter/Return

In the left column of the Add-ons page, click Extensions.

Then cast a critical eye over the list on the right side. Any extensions Firefox installs for built-in features are hidden from this page, so everything listed here is your choice (and your responsibility) to manage. Anything suspicious or that you just do not remember installing or why? If in doubt, disable (or remove).

What about the rest of your profile? settings, passwords . . . . .

Look on your desktop. Do you see a folder called; Old Firefox? Look inside. Look for the folder with the latest creation date.

https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile

https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles

https://support.mozilla.org/en-US/kb/how-run-firefox-when-profile-missing-inaccessible