When using Firefox, I often replace part of a URL to navigate to a different page following these steps:
We already have autocomplete suggestions when typing a domain name from scratch. This change would be an extension of that behaviour in the instance where a user starts to edit part of a URL instead.
Other possibilities considered
I accept that there are other ways to achieve my goal, e.g., I could just type 'soccer' into the address bar and Firefox would recognise the keyword from my visited pages history and suggest the desired URL. However, I only realised this today when forcing myself to consider alternative solutions before I posted this idea. I believe it would be a fair assumption that other users interact with the address bar in the same way as me.
Thank you for reading.