But not for the reason you think. Here the blocked site can't open a window because I set the browser to not open other windows.
For firefox, try this: https://support.mozilla.org/t5/Manage-preferences-and-add-ons/Pop-up-blocker-settings-exceptions-and-troubleshooting/ta-p/1414
So here, I never see the issue you noted.
Started using this add-on about a week ago, and started adding sites to block. While it does block 'sites', the window still opens and then I have to close this new window. Assuming this is the way its supposed to work, is there an add-on or free program that when you add a site to block, it keeps the site from opening a new window in the first place. I am also using ublock origin.
Thanks in advance