>>>>>>>Update: Found more than one Extension that has a word "Incognito" in the title. For example, "Incognito for Chrome", "New Incognito Windows". But the "Incognito for Chrome", even though has only 13 reviews, all positive, 5 stars. Is this the one you suggest?
>>>>>>
>>>>>>At least in firefox it's not an add-on but a built-in feature. Press ctrl+shift+p.
>>>>>
>>>>>I don't use firefox.
>>>>
>>>>Most of the keyboard shortcuts have become sort of standard... perhaps Chrome complies. Just try it.
>>>
>>>It brings up Printer dialog in Chrome.
>>
>>Right... in Chromium (the open source version of it, in Linux) it's ctrl+shift+n, try that. Found that when I clicked the ... button somewhere to the right, says so in the dropdown.
>
>I figured that I can open a page, e.g. New York Times, and read without them stopping me for a subscription password. I didn't really go into articles but it seems to work.
>I also opened the Spain TV page but this one does not seem to work. So, they must still see (by my IP) that I am coming from abroad without some license permitting watching sports.
>Other thing I found that I cannot minimize the page in Incognito mode. When I minimize it, it is gone.
>Learning something new and more or less useless :). I should be writing code :)
>UPDATE: Minimizing works.

I have had firefox on my machine for a long time but never used it much until I got this message "IMPORTANT: To access this site, you must be using Firefox 56+ or Google Chrome 61+ web browser on your computer. Microsoft Edge and Microsoft Internet Explorer are not preferred browsers and are less compatible with this site.". You know the British reputation for understatement - "not preferred" really means "will not work". This a large broker in London that holds a lot of my money so I started using firefox.