Set this to On and Reader will be activated by default on all compatible web pages.

At the bottom of this page you’ll see the option: ‘When visiting other websites’.

As above go to Safari > Preferences and choose Reader.

You can actually set Reader mode to be the default option on any website that supports it! Here’s how: How to use Reader mode all the time on Safari Select the website you want to default to Reader mode and click the menu to the right of it and select On (or Off if you don’t want it to use Reader mode). You’ll see a list of all the websites currently open and any you have configured to use Reader. You can also remove domains from, and add them to, the Reader list in Safari’s Preferences page.

Under the heading ‘When visiting this website’, put a tick next to ‘Use Reader when available’.

When you’re on a site you want to give this treatment, go to Safari > Settings for This Website (or you can right-click the URL box and choose Settings for This Website). Here’s how to set reader mode up for certain websites:

Google chrome pop up blocker extension