That ALWAYS happens to me!!
It’s a real problem at the moment because my operating system is so out of date that Chrome has stopped doing compatible updates, which in turn means that Chrome’s built-in version of Flash has stopped working and won’t update, so there are now big chunks of the internet that don’t work. And in order to manually update Flash I have to turn off the built-in version, which means I need to open the Settings page. But I’ve got so many windows open that the browser can’t cope with the Settings page and crashes whenever I open it.
So basically I can’t use this browser any more, but nor can I stop using it until I deal with all these windows!
(But Jamie, why not update your operating system so Chrome will start automatically updating itself again? Because apparently my operating system is so out of date that I can’t download the new version, I have to actually buy a physical copy of the new one or something.)
(The moral of this story is that apparently you have to upgrade stuff before it stops working, because if something is old enough to need an upgrade it is also too old to upgrade.)