Test bridges we ship in Tor Browser regularly
We should try to detect broken bridges we ship in Tor Browser early to minimize users trying them and to avoid overloading the remaining ones considerably/over a long period of time.
Not sure what "regularly" should mean in this context but I guess just testing them during our normal QA might not be enough as they could be down/unreachable temporarily.
We might set up something different maybe, even with a system that sends an email to the bridge operator (Cc'ing tor-assistants) after the bridge is repeatedly not usable.