I just added 2 images. One shows how Firefox starts up with the blank tab. The other shows the gmail URL that is in my settings to use and it works when I type it in manually.

Hi jsteding49, 5 other users reported a similar problem in the past few days with starting up to their home pages. The Home button works, the home page loads in new windows, but for some reason at startup the home page doesn't load. One other user had this issue with Gmail, and three with Yahoo.

I don't know what is causing this issue, but sometimes clearing the cache before shutdown helps on the next startup (but not on future startups), suggesting cached files could be a factor. Or maybe a somewhat common setting or add-on is a factor. I wish I had a diagnosis but we are still seeing new cases coming in.

If you get a chance to test it, does Ctrl+Shift+r -- a reload bypassing cached files -- work to load the Gmail page?

Also, do you know whether a persistent cookie is being used to keep you logged in to your Google Account at startup, or whether Firefox is supposed to fill a login form to get you into the site?

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem.

• switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
• do NOT click the "Refresh Firefox" button on the Safe Mode start window

• https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

Thank you to @jscher2000. Clearing my cache seemed to do the job!