How to Stop Your FireFox Accesses detectportal.firefox.com

  |     | https://www.rainbow-link.com/marketing_article20.htm

(1) Open a new tab/window, copy

and paste it in the address bar and press Enter/Return.

(2) Copy

and paste it into the search box above the list.

(3) Click/Double-click the preference column of 'network.captive-portal-service.enabled' to switch the value from true to false.