firefox oddity

My home page contains many of my frequently visited links.

Lately my Firefox Back button often skips the prior page if it was my home page.

For example:
Home Page -> Page 1
click back button (goes back to Home Page, as expected)
Home Page -> Page 2
click back button (goes back to Page 1 instead of Home Page)

When I close and restart the browser and purposely try to recreate the problem, it doesn't happen.

When it has happened, and I checked my History, the History includes the Home Page - so it's not that my Home Page is being filtered out of the History.

At work, I've noticed a different problem occasionally.
Home Page -> Page 1
(back button is disabled)

Has anyone else noticed these kinds of issues lately? I'm wondering if it may be due to an add-on. But as I haven't been able to recreate it at will, I haven't tried disabling the add-ons yet.

light! action!

I really feel like posting about several things.
But there's so much to do (some of which would be explained by those posts I want to write), and only 5 hours of daylight left today.