I haven't heard of that e-sports site. Usually when a suggestion populates directly in the address bar, it has been visited in your Firefox in the past. You can search for it in history using the Library window (Ctrl+Shift+H) or "Manage History".

In the tiny search box at the upper right, enter dot and pause for matches. If you do see something you want to remove, I suggest a deep flush: right-click the item and choose Forget About This Site. Firefox may take a while to do some background cleaning, but hopefully that will prevent it from being suggested in the future.

If it's not in history, any chance it's in bookmarks? I don't see the little star on the icon in the address bar drop-down, so maybe not, but just in case, you can click All Bookmarks in the left column of the Library window and now use the tiny search box to check bookmarks.

For Gmail, the actual address doesn't contain Gmail:

https://mail.google.com/mail/u/0/#inbox

I don't know whether in-URL-bar autofill is supposed to also match off the page title, or whether that only works for matches in the drop-down.

On a separate note, your address bar drop-down shows signs of old userChrome.css rules from the Firefox 76 days. Those rules recently became obsolete, so you should remove everything in code blocks with the

[breakout-extend]

selector.

I haven't heard of that e-sports site. Usually when a suggestion populates directly in the address bar, it has been visited in your Firefox in the past. You can search for it in history using the Library window (Ctrl+Shift+H) or "Manage History". In the tiny search box at the upper right, enter dot and pause for matches. If you do see something you want to remove, I suggest a deep flush: right-click the item and choose Forget About This Site. Firefox may take a while to do some background cleaning, but hopefully that will prevent it from being suggested in the future. If it's not in history, any chance it's in bookmarks? I don't see the little star on the icon in the address bar drop-down, so maybe not, but just in case, you can click All Bookmarks in the left column of the Library window and now use the tiny search box to check bookmarks.

It wasn't in bookmarks, it was in my history, but only because I'd typed d, expected it to show another site I visit that begins with d and pressed enter.

For Gmail, the actual address doesn't contain Gmail: https://mail.google.com/mail/u/0/#inbox I don't know whether in-URL-bar autofill is supposed to also match off the page title, or whether that only works for matches in the drop-down.

Good spot - it's probably something that changed several years ago and I've never noticed it, I just always went to gmail.com and it's redirected me automatically.

I'll see if it starts being suggested if I type ma....

On a separate note, your address bar drop-down shows signs of old userChrome.css rules from the Firefox 76 days. Those rules recently became obsolete, so you should remove everything in code blocks with the [breakout-extend] selector.

You've lost me here - where exactly am I looking to find the code blocks?

I think the reason Firefox doesn't add gmail.com to history is that it immediately redirects.

Regarding the address bar drop-down, yours is popped up out of its usual space. This is usually caused by old code in a userChrome.css file. Do you recall ever setting up a userChrome.css file to modify Firefox's toolbar area??