Hi R.D.Gwynn, please ignore the fake support email address someone is spamming here. A genuine community support volunteer will reply in this thread. https://support.mozilla.org/questions/1289061

Hi R.D.Gwynn, could you try the Email Link feature? There is an optional toolbar button for that, but what I do is use the File menu. Here's how:

If you don't keep the menu bar turned on, tap the Alt key or F10 key to show the menu bar temporarily. Then click File > Email Link. Firefox should grab the title and URL of the currently displayed page and send it to your preferred email client.

If you never clicked an email link before, Firefox might not know what email client to use and ask you to choose between Windows Mail, Gmail, and perhaps some other choices. If you need to fix that setting yourself, please check the steps in the following article: Change the program used to open email links.

Does that work on yours?

And finally, if you plan to share page links often, you can find that optional toolbar button in the Customize tab and add it to your toolbar. More info on that: Customize Firefox controls, buttons and toolbars.