Hi surftracefree, Firefox has a global scaling factor for the entire browser, including toolbars and content. Here's how you can try increasing that:

(1) In a new tab, type or paste about:config in the address bar and press Enter. Click the button accepting the risk.

(2) In the filter box, type or paste devp and pause while the list is filtered

(3) Double-click layout.css.devPixelsPerPx and change its value to 1.5 and click OK. That corresponds to 150% of the classic font size.

Too big? Try 1.25

Too small? Try 2.0

Don't choose a value below 1.0 or about 4.0 or you may find it difficult to get back to a viewable Firefox! If something does go terribly wrong, right-click the preference and then tap the R key to reset to the starting value.

Any improvement?

If the bars become too tall, try using "Compact" density on the Customize screen: Customize Firefox controls, buttons and toolbars.

Thanks!! that did the trick.

Now is there a way to make the bottom footer/task bar larger? The icons for the applications and time are really small.

Hmm, if you mean the Windows Taskbar, take a look at this:

https://support.microsoft.com/en-us/help/4028566/windows-10-change-the-size-of-text