Yeah, I just don't get it. This has been ongoing for awhile now, and I have to admit, I've really been scratching my head on this one.
It appears to be related to how web pages are retrieved from their servers. I rolled back to older versions of Firefox and the problem stopped. For whatever reason, these latest updates have screwed something up big time. Not sure why it's exclusive to Firefox either. No worries though. I like Chrome...it just takes a little getting used to LOL.