I saw this highly recommended on a few web sites but it didn't work for me. It wouldn't let me log into my grocery store to order groceries which isn't exactly something I can just forego. I tried to add the store site as a trusted site but still no luck. The only way I could login was to disable this extension. It was this app or food. I chose food.

Gracias

Probably the most highly regarded extension for Firefox, and with it providing superior blocking to Chrome and Edge thanks to more advanced ad interception API's in Firefox, it is both browser and browsing defining.