Thanks for the feedback! We're working on making a separate Android app. It doesn't work well as a browser extension on Android because it needs to run as a background process. Here's some info tracking the Android work: https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake-mobile/-/wikis/home

Thanks for the suggestion.

We're working on that in,
https://trac.torproject.org/projects/tor/ticket/31201

When the extension starts up, it does some feature detection (for websockets, webrtc) and a connectivity test (to the bridge). If everything is passing, it should display the string, "Your Snowflake is ready to help users circumvent censorship" (or, the equivalent translation). That's currently the indication that it's working.

Note that, by design, there are many more snowflakes than users, so it may take a while before accepting a connection.

We're working on better ways to communicate that the extension is being useful in,
https://trac.torproject.org/projects/tor/ticket/31109