In the second window of Firefox I was offered programs that I used more often. These have disappeared. How do I restore the symbols?

Firefox, PC with Windows 8.1, laptop with Windows 7, uBlock Origin.

The problem is with both, so probably not a Windows problem.

In Firefox you have the option of saving a bookmark in the LZ menu or on the toolbar.

If you want to go to a previously used page, look at the chronicle.

Since the exact explanations are too extensive, I recommend a PC course on the Internet.

I do all of that, but nothing is saved in the second window.

Please a picture.