This may have been wry humor on your part, but of course there is no Safari on Android... I do see the behavior you describe in the News & Weather app, which likes to open links in embedded Chrome Web Views (unless I long-press and then they will offer to open in browser, which happens to be FF).
For the majority of smartphone users, Gmail just one day started using Chromeframe to open all links without permission.
These behaviors are being used more and more as Google tries to tie your actions together into a single identity.