Wait that wasn’t a thing yet? That’s great tho!
No it’s not new, I think they were just trying to say they like the feature.
They should remove the words “adding the”. So the sentence would be “I really appreciate Firefox ability to enable custom search”. The way they phrase it sounds like Firefox has recently added the custom search engine function.
@Boomkop3 Evidently, there was a way to do it but I could never figure out how. Now, you just go to a search engine you want to make as a default, open up the address bar drop-down for that search engine and there should be a button at the bottom of the drop-down menu that has the favicon for that search engine with a plus icon. Then, from there, you just set it as the default in the way you would with the built-in options!