Also, there are some problems with parsing spaces and parenthesis, if someone could link me the source code to this function I'd be happy to fix it.

Do you mean in the Google search suggestions? From what I can see from various experiments, as soon as you type a / character, Firefox immediately stops asking for further suggestions. Example screenshot attached, showing the address bar drop-down and Browser Console (showing Network > XHR). If you type quickly, you might only have one request in the console.

I guess the question is why -- URL privacy? -- and whether to completely change that, or set up rules related to certain characters Firefox is allowed to send for suggestions.

See also: https://developer.mozilla.org/docs/Tools/Browser_Console

Yes, those are the ones I'm referring to. You are probably right that it is done to ensure privacy, since fractions separated with a coma like 1,3 instead of 1.3 work. But I also believe this function is very convenient to have fully working. There are probably ways to ensure privacy, for example check that the input to the left of '/' is a valid IP, domain, or path, and stop the suggestions then?

Maybe the following would be a place to bat around ideas?

https://discourse.mozilla.org/c/firefox-development

Sure,thanks.