I discovered today that the great suspender extension have been disabled. After a little search, I found out malicious code was added to it, and for this reason, Google Chrome blocked the extension … 3 month ago.
So if you just discovered that the extension have been suspended, that means that theorically you have been spyed on for lots of month and that you might want to change all your password.
More information :
Thoose link also contain information about how to get back your tabs and about a replacement (but your main concern should be that your password are no longer safe).