Q: preventing a web site from hijacking safari

There are a number of web sites that I occasionally stumble on to that have the ability to take complete control of Safari so that I cannot close the window just opened.  These sites want to always download something and there is no option to say "No".   If you click on "Cancel" the warning message will show up again.  There is an option to not show warning dialogues again, but that just allows the window underneath the dialogue to continue holding Safari hostage.

When this happens to me, I turn off my network connection and force quit Safari.  Then I open it back up again.  Most often, this will allow me to regain control, but sometimes it is necessary to make sure that Safari will open without opening the web pages that I had been viewing.

I copied the following links from my Safari history.  Note that if you do that, the title of the page will show up and not the link itself.  By selecting the link you can make an "A" icon show up and convert it to a "bare link".

This web site:  (Don't open it!)

quinarie.***/Fica_And_Medicare_Rates_For_2017

Opened this one:

youssfiles.***/325D3A472449382B225422682D4D4925949C38DD3981233384C9D4DFBFFEEB0EA DE48BFBC5D872D9A9A741EDF1CE1CF7?PubID=413318&slp=easydefile.***&ClickID=15614894 8312

which then opened this one:

storage.googleapis.***/systemsupportalertmynewsecurity/mac/

Which was titled "redirecting you to Apple", which then included dialogue boxes that would have forced me to download a "new video player".  There was no indication of what that video player was for.

I am uncomfortable in that I cannot be sure that the link was not downloaded.  Nothing is in my download folder and no warning dialogues came up telling me that I had downloaded something from the internet.

There must be other threads addressing this problem but I have not found them.

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