Why is there a big Mozilla.org/en-US/questions/ etcetera

...  V    STAR     on my Firefox browser?    

This all looks really fake, like I have been taken over by a virus.

Note that the Bookmarks/History Manager has always be named Library since Firefox 4 when SQLite database files were being used instead of individual files, so this isn't recent. There are now some lists (bookmarks, history, highlights) exposed that show pages that you recently have used.

There used to be smart folders like "Most Visited" and "Recently Bookmarked" that showed this data. It wasn't always understood how these smart folders that simply shows a list generated from a query worked and people thought that they had multiple copied, but smart folder just show a list of items stored elsewhere and removing an item via the right-click context menu caused the original item to disappear.

You can consider to use a New Private Window to visit web pages with sensitive data that you do not want to appear in the history.

I just one more teeny question. I really, really miss my app that will let me click on a youtube and presto, my Outlook has an email all set up, title of the youtube inserted in the subject and the link posted at the beginning of a fresh email. I used to use that constantly, and I've searched everywhere to find it, but now it's gone from all the listed apps. Seems like there are a lot of duplicate apps, but nothing to match what I used to have.

It looked like a sideways, small green arrow. Lots of people used it, as I remember it was a popular app. Can we possibly ever get it back?

It's true that YouTube provides a share opportunity, but it's not as good as what I had before. I have to write the title into the subject line and a few more clicks, and that is distracting, requires me to stop what I'm doing and write a title/subject. Call me lazy, but I really miss that app and I used it a LOT. It was a really nice app.

If not, I will survive.

One more thing. I Googled Firefox to see what was happening, why all the changes were going on, and saw nothing. I called my server and they were so busy I had to schedule a callback. I called my computer shop and that's where I found out that Firefox is now Quantum. I used Internet Explorer to find out what you guys were doing. Before that, I was freaking out that I'd been hacked with a terrible virus, such as the chromium virus I got hacked with several months ago that cost me money, aggravation and a lot of lost time. An explanation and warning would have been very good to have in advance, and also not to take away our apps. But it's not a fatal thing, and I am relieved that it's not that, so it's water under the bridge now.