i tried searching on internet about this question and how Firebase handle indexing and how owner of the content running on Firebase hosting can influence crawling by Google bot.
Personally, i am running website built with Polymer + Firebase as backend (so basically SPA) with like 150 visitors per week and my website has common navigation with 5 links:
Also projects page has nested
Google indexed my website far more than it should and currently results like this appear when googling
So back to my question: How can i influence Google bot to forbid crawling specific sites? It is enough to just upload robots.txt or sitemap file along with other files like i would normally do with common hosting?