On each of the following pics look for where my cursor is placed, then click on that same spot on your PC. Only do this when you get the annoying pop-up because you will need to copy the URL (web address) of that pop-up so that you can paste in Step 7. All of these steps are easy & quick. Should only take a couple of minutes total.
Step 1 - Click on the 3 vertical dots
Step 2 - Click on Settings
Step 3 - Click on Privacy & Security
Step 4 - Click on Site Settings
Step 5 - Click on Pop-ups & Redirects
Step 6 - Click on Add
Step 7 - Copy the URL of the pop-up you got, paste it in this box then click on Add
You will most likely need to do this a few times because the bastards just change their url to get past your block, but eventually they run out and all those pop-ups stop. I think I had to do this process about 4 times.