bjbhunttx Said:
"Adding an ad blocker extension When trying to install an ad-blocker extension, I get this message. The app does not appear to download, or allow me to proceed. Obviously, I'm not a techie. Need some assistance. Thanks. Extensions can be enabled in the Develop menu."
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See if this Helps: Use the Developer Tools in the Develop Menu in Safari on Mac - Apple Support
As it reads: "If you don’t see the Develop menu in the menu bar, choose Safari > Preferences, click Advanced, then select “Show Develop menu in menu bar"