DA, watch that thinking while eating lunch...it's bad for the digestion! However it is much appreciated. Below are the answers to your questions. 1. Have you tried FF bare boned with not add-ons to see if this occurs? Ans. Yes 2. Have you tried a prior version of FF? Ans, Yes, just a few minutes ago. I un-installed ver 11.0 and installed the older 10.0.2 in it's place. I also un-installed Flash Player and re-installed that again. ...still the same results after shutting down and re-starting! 3. Do you have FF set to delete history when closing? Ans, No. Thanks, Horton.

First guess: Are you installing the correct version; I.E. vs. Non-I.E.? If you are doing a "run-install" you absolutely have to be downloading the proper version. If you are doing a "save-install" you can use any browser to download-save-install either version, but it will only effect the target browser.. In my case I have FF, Opera, Google, SlimBrowser and I.E.9 installed on the system so I have both versions of Flash installed. Use the tool below to uninstall whatever you currently have installed. Then be triple sure you install the correct one. DA Here is a link that might be useful: Flash Uninstaller

That used to happen to me and I read somewhere it is a false update and FF had something to do with it. I still get it when I watch a u tube. It tells me I need flash player to watch it and in spite of the warning it still plays.

I'm going to try Bugspop1's suggestions. I have Xfinity1 and ATT routers, so it may be perilous and require calling them again for help. Also both routers have been replaced in the past 2 weeks because of other problems: The ATT router suddenly and mysteriously stopped allowing any telephone caller ID and calling features...the technician who replaced the router said he didn't know why this happened or what caused it. ATT provides 3 mbps speed, which is (from my experience) not fast enough for Amazon video, so we use ATT mainly when Xfinity isn't working. We have just one phone connected to ATT. The Xfinity/Comcast router was replaced last week because of tv issues. I got fed up with the poor service on the last cable boxes. All channels not HD were stretched to fit the format of our HD tvs. So all the people on tv look like they weigh 500 lbs. Comcast refused for months to provide info to change this in the setup menu of the cable box. So after hours on the phone to them and several trips to their store, we now have tv that shows HD and SD in the proper formats. I also had to accept yet another phone line from Comcast, their bundle, to save money. Their internet/tv bill was $270. The new bill including phone is now supposed to be $190. The stupid downside to this is the Comcast rep said I have to call Comcast on the phone number they provide, otherwise they won't provide any support. I already have 4 phone numbers so this is very annoying to me. After the cable boxes were replaced the internet router was reset by Comcast when they set up the cable boxes. That evening I logged in to the xfinity web site and saw that some videos would play and others wouldn't. CNN wouldn't play anything at all (though accessing the site outside of the xfinity portal allows some videos to play). So I called up Xfinity support who weren't helpful at all. They actually said they don't support video playback help issues on their own site! So their support is less than adequate imho. I tried the suggestions about changing video quality...Amazon works ok in SD. In HD videos start off in very poor quality and gradually get better. I don't use amazon streaming when I'm out of town because the site only streams in HD and would quickly use up my data allowance. Windows Defender is up to date. Nvidia has automatically updated it's drivers several times since I got the MSI laptop. The MSI also did the update where it installed a new version of Win10 (It took about 17 hours). There isn't any software in common on the two laptops. I tried a system restore on the MSI. It didn't help, but it didn't hurt. I uninstalled and reinstalled Adobe flash several times. If I can get inside the router setup menus is it easy to figure out if the routers are allowing adobe flash video? I'll keep working on this....