User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:44.0) Gecko/20100101 Firefox/44.0 Build ID: 20160123151951 Steps to reproduce: This bug is newly introduced in version 44 of Firefox. It occurs on Windows and Linux. May Windows header: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:44.0) Gecko/20100101 Firefox/44.0 User "dhgutteridge" reported this issue also on Fedora 23 (Link: https://bodhi.fedoraproject.org/updates/FEDORA-2016-c12fa80d79) Needed settings in Firefox: 1) Options --> Privacy 2) Set options according to Screenshot "settings1.png" 3) Set options according to Screenshot "settings2.png" 4) Login to a webpage 5) Logout 6) Close Firefox 7) Re-open Firefox 8) Navigate to the same webpage 9) When you type your mail address to login, it is still in the cache Actual results: When you type your mail address to login, it is still in the cache. Expected results: The cache should be cleared after closing Firefox. In version 43 this worked as expected.

Where is the screenshot "settings1.png"?

(In reply to Loic from comment #1) > Where is the screenshot "settings1.png"? Sorry, somehow I missed the upload. Now it is uploaded.

Yes, it's a known regression about Firefox not clearing forms on exit.