I finally found a method to prevent Firefox from phoning home when first started up.
When you first open Firefox, you will receive a PROGRAM COMPONENT alert that Firefox and components are trying to act as a server. I use ZAPRO and I have it configured to block Internet servers globally. The procedure I use to prevent Firefox from phoning home will NOT prevent this alert from displaying(unfortunately). I click Deny every time.
That said, forum member UphillStruggle provided a link that provides the procedure for terminating those connections by configuring Firefox using the command, about:config, from the address bar. Here is the link:
I followed the procedure exactly as listed here. For the Live Bookmarks section, I clicked the Bookmarks menu, then the Organize Bookmarks command. I expanded out Bookmarks and deleted everything I could using the toolbar button Delete. Once done, there should only be a parent folder named Bookmarks and a subfolder named Bookmarks. Using about:config to configure Firefox, you need only double click an entry to change it from its default value and once you do that, the entry will be bolded and, under the Status column, will read, user set, instead of default. Under the Prefetching links section, I set network.prefetch-next to false. I did not find the entry, browser.send_pings, so disregard that one.
Thanks again to UphillStruggle for the link and also to Oldsod for his technical insight on this problem.