It would be better to uninstall it rather than deactivate it. The probability that the bug will be fixed will be quite low. Because there is an unlimited number of pages on the Internet, and it is very unlikely that the author of the add-on will encounter one of the some pages that you say by chance. Even if the author encounters one of the some pages, if the add-on was deactivated at that time then the bug will not be detected. That is why I think it is of little hope.