I just updated to version 8.4.1.1 and have experienced several issues. It has not been able identify data fields on web pages that worked fine with earlier version. The menu no longer appears on pop-up windows such as PayPal log-in. It also appears to slowing Firfox launch to a crawl. Bid disappointment. Running Windows 10 (64 bit) fully patched and Firefox 56.0.1 (64 bit).